Calculus Examples

$x^{5} {(1 - x)}^{6}$

Step 1

Write $x^{5} {(1 - x)}^{6}$ as a function.

$f (x) = x^{5} {(1 - x)}^{6}$

Step 2

Find the first derivative of the function.

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Step 2.1

Differentiate using the Product Rule which states that $\frac{d}{d x} [f (x) g (x)]$ is $f (x) \frac{d}{d x} [g (x)] + g (x) \frac{d}{d x} [f (x)]$ where $f (x) = x^{5}$ and $g (x) = {(1 - x)}^{6}$ .

$x^{5} \frac{d}{d x} [{(1 - x)}^{6}] + {(1 - x)}^{6} \frac{d}{d x} [x^{5}]$

Step 2.2

Differentiate using the chain rule, which states that $\frac{d}{d x} [f (g (x))]$ is $f' (g (x)) g' (x)$ where $f (x) = x^{6}$ and $g (x) = 1 - x$ .

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Step 2.2.1

To apply the Chain Rule, set $u$ as $1 - x$ .

$x^{5} (\frac{d}{d u} [u^{6}] \frac{d}{d x} [1 - x]) + {(1 - x)}^{6} \frac{d}{d x} [x^{5}]$

Step 2.2.2

Differentiate using the Power Rule which states that $\frac{d}{d u} [u^{n}]$ is $n u^{n - 1}$ where $n = 6$ .

$x^{5} (6 u^{5} \frac{d}{d x} [1 - x]) + {(1 - x)}^{6} \frac{d}{d x} [x^{5}]$

Step 2.2.3

Replace all occurrences of $u$ with $1 - x$ .

$x^{5} (6 {(1 - x)}^{5} \frac{d}{d x} [1 - x]) + {(1 - x)}^{6} \frac{d}{d x} [x^{5}]$

Step 2.3

Differentiate.

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Step 2.3.1

By the Sum Rule, the derivative of $1 - x$ with respect to $x$ is $\frac{d}{d x} [1] + \frac{d}{d x} [- x]$ .

$x^{5} (6 {(1 - x)}^{5} (\frac{d}{d x} [1] + \frac{d}{d x} [- x])) + {(1 - x)}^{6} \frac{d}{d x} [x^{5}]$

Step 2.3.2

Since $1$ is constant with respect to $x$ , the derivative of $1$ with respect to $x$ is $0$ .

$x^{5} (6 {(1 - x)}^{5} (0 + \frac{d}{d x} [- x])) + {(1 - x)}^{6} \frac{d}{d x} [x^{5}]$

Step 2.3.3

Add $0$ and $\frac{d}{d x} [- x]$ .

$x^{5} (6 {(1 - x)}^{5} \frac{d}{d x} [- x]) + {(1 - x)}^{6} \frac{d}{d x} [x^{5}]$

Step 2.3.4

Since $- 1$ is constant with respect to $x$ , the derivative of $- x$ with respect to $x$ is $- \frac{d}{d x} [x]$ .

$x^{5} (6 {(1 - x)}^{5} (- \frac{d}{d x} [x])) + {(1 - x)}^{6} \frac{d}{d x} [x^{5}]$

Step 2.3.5

Multiply $- 1$ by $6$ .

$x^{5} (- 6 {(1 - x)}^{5} \frac{d}{d x} [x]) + {(1 - x)}^{6} \frac{d}{d x} [x^{5}]$

Step 2.3.6

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 1$ .

$x^{5} (- 6 {(1 - x)}^{5} \cdot 1) + {(1 - x)}^{6} \frac{d}{d x} [x^{5}]$

Step 2.3.7

Multiply $- 6$ by $1$ .

$x^{5} (- 6 {(1 - x)}^{5}) + {(1 - x)}^{6} \frac{d}{d x} [x^{5}]$

Step 2.3.8

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 5$ .

$x^{5} (- 6 {(1 - x)}^{5}) + {(1 - x)}^{6} (5 x^{4})$

Step 2.3.9

Move $5$ to the left of ${(1 - x)}^{6}$ .

$x^{5} (- 6 {(1 - x)}^{5}) + 5 \cdot {(1 - x)}^{6} x^{4}$

Step 2.4

Simplify.

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Step 2.4.1

Factor $x^{4} {(1 - x)}^{5}$ out of $x^{5} (- 6 {(1 - x)}^{5}) + 5 {(1 - x)}^{6} x^{4}$ .

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Step 2.4.1.1

Factor $x^{4} {(1 - x)}^{5}$ out of $x^{5} (- 6 {(1 - x)}^{5})$ .

$x^{4} {(1 - x)}^{5} (x \cdot (- 6)) + 5 {(1 - x)}^{6} x^{4}$

Step 2.4.1.2

Factor $x^{4} {(1 - x)}^{5}$ out of $5 {(1 - x)}^{6} x^{4}$ .

$x^{4} {(1 - x)}^{5} (x \cdot (- 6)) + x^{4} {(1 - x)}^{5} (5 (1 - x))$

Step 2.4.1.3

Factor $x^{4} {(1 - x)}^{5}$ out of $x^{4} {(1 - x)}^{5} (x \cdot (- 6)) + x^{4} {(1 - x)}^{5} (5 (1 - x))$ .

$x^{4} {(1 - x)}^{5} (x \cdot (- 6) + 5 (1 - x))$

Step 2.4.2

Move $- 6$ to the left of $x$ .

$x^{4} {(1 - x)}^{5} (- 6 x + 5 (1 - x))$

Step 3

Find the second derivative of the function.

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Step 3.1

Simplify terms.

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Step 3.1.1

Simplify each term.

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Step 3.1.1.1

Apply the distributive property.

$f'' (x) = \frac{d}{d x} (x^{4} {(1 - x)}^{5} (- 6 x + 5 \cdot 1 + 5 (- x)))$

Step 3.1.1.2

Multiply $5$ by $1$ .

$f'' (x) = \frac{d}{d x} (x^{4} {(1 - x)}^{5} (- 6 x + 5 + 5 (- x)))$

Step 3.1.1.3

Multiply $- 1$ by $5$ .

$f'' (x) = \frac{d}{d x} (x^{4} {(1 - x)}^{5} (- 6 x + 5 - 5 x))$

Step 3.1.2

Subtract $5 x$ from $- 6 x$ .

$f'' (x) = \frac{d}{d x} (x^{4} {(1 - x)}^{5} (- 11 x + 5))$

Step 3.2

Differentiate using the Product Rule which states that $\frac{d}{d x} [f (x) g (x)]$ is $f (x) \frac{d}{d x} [g (x)] + g (x) \frac{d}{d x} [f (x)]$ where $f (x) = x^{4} {(1 - x)}^{5}$ and $g (x) = - 11 x + 5$ .

$f'' (x) = x^{4} {(1 - x)}^{5} \frac{d}{d x} (- 11 x + 5) + (- 11 x + 5) \frac{d}{d x} (x^{4} {(1 - x)}^{5})$

Step 3.3

Differentiate.

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Step 3.3.1

By the Sum Rule, the derivative of $- 11 x + 5$ with respect to $x$ is $\frac{d}{d x} [- 11 x] + \frac{d}{d x} [5]$ .

$f'' (x) = x^{4} {(1 - x)}^{5} (\frac{d}{d x} (- 11 x) + \frac{d}{d x} (5)) + (- 11 x + 5) \frac{d}{d x} (x^{4} {(1 - x)}^{5})$

Step 3.3.2

Since $- 11$ is constant with respect to $x$ , the derivative of $- 11 x$ with respect to $x$ is $- 11 \frac{d}{d x} [x]$ .

$f'' (x) = x^{4} {(1 - x)}^{5} (- 11 \frac{d}{d x} x + \frac{d}{d x} (5)) + (- 11 x + 5) \frac{d}{d x} (x^{4} {(1 - x)}^{5})$

Step 3.3.3

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 1$ .

$f'' (x) = x^{4} {(1 - x)}^{5} (- 11 \cdot 1 + \frac{d}{d x} (5)) + (- 11 x + 5) \frac{d}{d x} (x^{4} {(1 - x)}^{5})$

Step 3.3.4

Multiply $- 11$ by $1$ .

$f'' (x) = x^{4} {(1 - x)}^{5} (- 11 + \frac{d}{d x} (5)) + (- 11 x + 5) \frac{d}{d x} (x^{4} {(1 - x)}^{5})$

Step 3.3.5

Since $5$ is constant with respect to $x$ , the derivative of $5$ with respect to $x$ is $0$ .

$f'' (x) = x^{4} {(1 - x)}^{5} (- 11 + 0) + (- 11 x + 5) \frac{d}{d x} (x^{4} {(1 - x)}^{5})$

Step 3.3.6

Simplify the expression.

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Step 3.3.6.1

Add $- 11$ and $0$ .

$f'' (x) = x^{4} {(1 - x)}^{5} \cdot - 11 + (- 11 x + 5) \frac{d}{d x} (x^{4} {(1 - x)}^{5})$

Step 3.3.6.2

Move $- 11$ to the left of $x^{4} {(1 - x)}^{5}$ .

$f'' (x) = - 11 \cdot (x^{4} {(1 - x)}^{5}) + (- 11 x + 5) \frac{d}{d x} (x^{4} {(1 - x)}^{5})$

Step 3.4

Differentiate using the Product Rule which states that $\frac{d}{d x} [f (x) g (x)]$ is $f (x) \frac{d}{d x} [g (x)] + g (x) \frac{d}{d x} [f (x)]$ where $f (x) = x^{4}$ and $g (x) = {(1 - x)}^{5}$ .

$f'' (x) = - 11 x^{4} {(1 - x)}^{5} + (- 11 x + 5) (x^{4} \frac{d}{d x} ({(1 - x)}^{5}) + {(1 - x)}^{5} \frac{d}{d x} (x^{4}))$

Step 3.5

Differentiate using the chain rule, which states that $\frac{d}{d x} [f (g (x))]$ is $f' (g (x)) g' (x)$ where $f (x) = x^{5}$ and $g (x) = 1 - x$ .

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Step 3.5.1

To apply the Chain Rule, set $u$ as $1 - x$ .

$f'' (x) = - 11 x^{4} {(1 - x)}^{5} + (- 11 x + 5) (x^{4} (\frac{d}{d u} (u^{5}) \frac{d}{d x} (1 - x)) + {(1 - x)}^{5} \frac{d}{d x} (x^{4}))$

Step 3.5.2

Differentiate using the Power Rule which states that $\frac{d}{d u} [u^{n}]$ is $n u^{n - 1}$ where $n = 5$ .

$f'' (x) = - 11 x^{4} {(1 - x)}^{5} + (- 11 x + 5) (x^{4} (5 u^{4} \frac{d}{d x} (1 - x)) + {(1 - x)}^{5} \frac{d}{d x} (x^{4}))$

Step 3.5.3

Replace all occurrences of $u$ with $1 - x$ .

$f'' (x) = - 11 x^{4} {(1 - x)}^{5} + (- 11 x + 5) (x^{4} (5 {(1 - x)}^{4} \frac{d}{d x} (1 - x)) + {(1 - x)}^{5} \frac{d}{d x} (x^{4}))$

Step 3.6

Differentiate.

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Step 3.6.1

By the Sum Rule, the derivative of $1 - x$ with respect to $x$ is $\frac{d}{d x} [1] + \frac{d}{d x} [- x]$ .

$f'' (x) = - 11 x^{4} {(1 - x)}^{5} + (- 11 x + 5) (x^{4} (5 {(1 - x)}^{4} (\frac{d}{d x} (1) + \frac{d}{d x} (- x))) + {(1 - x)}^{5} \frac{d}{d x} (x^{4}))$

Step 3.6.2

Since $1$ is constant with respect to $x$ , the derivative of $1$ with respect to $x$ is $0$ .

$f'' (x) = - 11 x^{4} {(1 - x)}^{5} + (- 11 x + 5) (x^{4} (5 {(1 - x)}^{4} (0 + \frac{d}{d x} (- x))) + {(1 - x)}^{5} \frac{d}{d x} (x^{4}))$

Step 3.6.3

Add $0$ and $\frac{d}{d x} [- x]$ .

$f'' (x) = - 11 x^{4} {(1 - x)}^{5} + (- 11 x + 5) (x^{4} (5 {(1 - x)}^{4} \frac{d}{d x} (- x)) + {(1 - x)}^{5} \frac{d}{d x} (x^{4}))$

Step 3.6.4

Since $- 1$ is constant with respect to $x$ , the derivative of $- x$ with respect to $x$ is $- \frac{d}{d x} [x]$ .

$f'' (x) = - 11 x^{4} {(1 - x)}^{5} + (- 11 x + 5) (x^{4} (5 {(1 - x)}^{4} (- \frac{d}{d x} x)) + {(1 - x)}^{5} \frac{d}{d x} (x^{4}))$

Step 3.6.5

Multiply $- 1$ by $5$ .

$f'' (x) = - 11 x^{4} {(1 - x)}^{5} + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4} \frac{d}{d x} x) + {(1 - x)}^{5} \frac{d}{d x} (x^{4}))$

Step 3.6.6

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 1$ .

$f'' (x) = - 11 x^{4} {(1 - x)}^{5} + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4} \cdot 1) + {(1 - x)}^{5} \frac{d}{d x} (x^{4}))$

Step 3.6.7

Multiply $- 5$ by $1$ .

$f'' (x) = - 11 x^{4} {(1 - x)}^{5} + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + {(1 - x)}^{5} \frac{d}{d x} (x^{4}))$

Step 3.6.8

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 4$ .

$f'' (x) = - 11 x^{4} {(1 - x)}^{5} + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + {(1 - x)}^{5} (4 x^{3}))$

Step 3.6.9

Move $4$ to the left of ${(1 - x)}^{5}$ .

$f'' (x) = - 11 x^{4} {(1 - x)}^{5} + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 \cdot ({(1 - x)}^{5} x^{3}))$

Step 3.7

Simplify.

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Step 3.7.1

Factor $1$ out of $- 11 x^{4} {(1 - x)}^{5} + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$ .

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Step 3.7.1.1

Factor $1$ out of $- 11 x^{4} {(1 - x)}^{5}$ .

$f'' (x) = 1 (- 11 x^{4} {(1 - x)}^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.1.2

Factor $1$ out of $(- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$ .

$f'' (x) = 1 (- 11 x^{4} {(1 - x)}^{5}) + 1 ((- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3}))$

Step 3.7.1.3

Factor $1$ out of $1 (- 11 x^{4} {(1 - x)}^{5}) + 1 ((- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3}))$ .

$f'' (x) = 1 (- 11 x^{4} {(1 - x)}^{5} + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3}))$

Step 3.7.2

Multiply $- 11 x^{4} {(1 - x)}^{5} + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$ by $1$ .

$f'' (x) = - 11 x^{4} {(1 - x)}^{5} + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3

Simplify each term.

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Step 3.7.3.1

Use the Binomial Theorem.

$f'' (x) = - 11 x^{4} (1^{5} + 5 \cdot (1^{4} (- x)) + 10 \cdot (1^{3} {(- x)}^{2}) + 10 \cdot (1^{2} {(- x)}^{3}) + 5 \cdot (1 {(- x)}^{4}) + {(- x)}^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.2

Simplify each term.

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Step 3.7.3.2.1

One to any power is one.

$f'' (x) = - 11 x^{4} (1 + 5 \cdot (1^{4} (- x)) + 10 \cdot (1^{3} {(- x)}^{2}) + 10 \cdot (1^{2} {(- x)}^{3}) + 5 \cdot (1 {(- x)}^{4}) + {(- x)}^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.2.2

One to any power is one.

$f'' (x) = - 11 x^{4} (1 + 5 \cdot (1 (- x)) + 10 \cdot (1^{3} {(- x)}^{2}) + 10 \cdot (1^{2} {(- x)}^{3}) + 5 \cdot (1 {(- x)}^{4}) + {(- x)}^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.2.3

Multiply $5$ by $1$ .

$f'' (x) = - 11 x^{4} (1 + 5 (- x) + 10 \cdot (1^{3} {(- x)}^{2}) + 10 \cdot (1^{2} {(- x)}^{3}) + 5 \cdot (1 {(- x)}^{4}) + {(- x)}^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.2.4

Multiply $- 1$ by $5$ .

$f'' (x) = - 11 x^{4} (1 - 5 x + 10 \cdot (1^{3} {(- x)}^{2}) + 10 \cdot (1^{2} {(- x)}^{3}) + 5 \cdot (1 {(- x)}^{4}) + {(- x)}^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.2.5

One to any power is one.

$f'' (x) = - 11 x^{4} (1 - 5 x + 10 \cdot (1 {(- x)}^{2}) + 10 \cdot (1^{2} {(- x)}^{3}) + 5 \cdot (1 {(- x)}^{4}) + {(- x)}^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.2.6

Multiply $10$ by $1$ .

$f'' (x) = - 11 x^{4} (1 - 5 x + 10 {(- x)}^{2} + 10 \cdot (1^{2} {(- x)}^{3}) + 5 \cdot (1 {(- x)}^{4}) + {(- x)}^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.2.7

Apply the product rule to $- x$ .

$f'' (x) = - 11 x^{4} (1 - 5 x + 10 ({(- 1)}^{2} x^{2}) + 10 \cdot (1^{2} {(- x)}^{3}) + 5 \cdot (1 {(- x)}^{4}) + {(- x)}^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.2.8

Raise $- 1$ to the power of $2$ .

$f'' (x) = - 11 x^{4} (1 - 5 x + 10 (1 x^{2}) + 10 \cdot (1^{2} {(- x)}^{3}) + 5 \cdot (1 {(- x)}^{4}) + {(- x)}^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.2.9

Multiply $x^{2}$ by $1$ .

$f'' (x) = - 11 x^{4} (1 - 5 x + 10 x^{2} + 10 \cdot (1^{2} {(- x)}^{3}) + 5 \cdot (1 {(- x)}^{4}) + {(- x)}^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.2.10

One to any power is one.

$f'' (x) = - 11 x^{4} (1 - 5 x + 10 x^{2} + 10 \cdot (1 {(- x)}^{3}) + 5 \cdot (1 {(- x)}^{4}) + {(- x)}^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.2.11

Multiply $10$ by $1$ .

$f'' (x) = - 11 x^{4} (1 - 5 x + 10 x^{2} + 10 {(- x)}^{3} + 5 \cdot (1 {(- x)}^{4}) + {(- x)}^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.2.12

Apply the product rule to $- x$ .

$f'' (x) = - 11 x^{4} (1 - 5 x + 10 x^{2} + 10 ({(- 1)}^{3} x^{3}) + 5 \cdot (1 {(- x)}^{4}) + {(- x)}^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.2.13

Raise $- 1$ to the power of $3$ .

$f'' (x) = - 11 x^{4} (1 - 5 x + 10 x^{2} + 10 (- x^{3}) + 5 \cdot (1 {(- x)}^{4}) + {(- x)}^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.2.14

Multiply $- 1$ by $10$ .

$f'' (x) = - 11 x^{4} (1 - 5 x + 10 x^{2} - 10 x^{3} + 5 \cdot (1 {(- x)}^{4}) + {(- x)}^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.2.15

Multiply $5$ by $1$ .

$f'' (x) = - 11 x^{4} (1 - 5 x + 10 x^{2} - 10 x^{3} + 5 {(- x)}^{4} + {(- x)}^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.2.16

Apply the product rule to $- x$ .

$f'' (x) = - 11 x^{4} (1 - 5 x + 10 x^{2} - 10 x^{3} + 5 ({(- 1)}^{4} x^{4}) + {(- x)}^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.2.17

Raise $- 1$ to the power of $4$ .

$f'' (x) = - 11 x^{4} (1 - 5 x + 10 x^{2} - 10 x^{3} + 5 (1 x^{4}) + {(- x)}^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.2.18

Multiply $x^{4}$ by $1$ .

$f'' (x) = - 11 x^{4} (1 - 5 x + 10 x^{2} - 10 x^{3} + 5 x^{4} + {(- x)}^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.2.19

Apply the product rule to $- x$ .

$f'' (x) = - 11 x^{4} (1 - 5 x + 10 x^{2} - 10 x^{3} + 5 x^{4} + {(- 1)}^{5} x^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.2.20

Raise $- 1$ to the power of $5$ .

$f'' (x) = - 11 x^{4} (1 - 5 x + 10 x^{2} - 10 x^{3} + 5 x^{4} - x^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.3

Apply the distributive property.

$f'' (x) = - 11 x^{4} \cdot 1 - 11 x^{4} (- 5 x) - 11 x^{4} (10 x^{2}) - 11 x^{4} (- 10 x^{3}) - 11 x^{4} (5 x^{4}) - 11 x^{4} (- x^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.4

Simplify.

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Step 3.7.3.4.1

Multiply $- 11$ by $1$ .

$f'' (x) = - 11 x^{4} - 11 x^{4} (- 5 x) - 11 x^{4} (10 x^{2}) - 11 x^{4} (- 10 x^{3}) - 11 x^{4} (5 x^{4}) - 11 x^{4} (- x^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.4.2

Rewrite using the commutative property of multiplication.

$f'' (x) = - 11 x^{4} - 11 \cdot (- 5 x^{4} x) - 11 x^{4} (10 x^{2}) - 11 x^{4} (- 10 x^{3}) - 11 x^{4} (5 x^{4}) - 11 x^{4} (- x^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.4.3

Rewrite using the commutative property of multiplication.

$f'' (x) = - 11 x^{4} - 11 \cdot (- 5 x^{4} x) - 11 \cdot (10 x^{4} x^{2}) - 11 x^{4} (- 10 x^{3}) - 11 x^{4} (5 x^{4}) - 11 x^{4} (- x^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.4.4

Rewrite using the commutative property of multiplication.

$f'' (x) = - 11 x^{4} - 11 \cdot (- 5 x^{4} x) - 11 \cdot (10 x^{4} x^{2}) - 11 \cdot (- 10 x^{4} x^{3}) - 11 x^{4} (5 x^{4}) - 11 x^{4} (- x^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.4.5

Rewrite using the commutative property of multiplication.

$f'' (x) = - 11 x^{4} - 11 \cdot (- 5 x^{4} x) - 11 \cdot (10 x^{4} x^{2}) - 11 \cdot (- 10 x^{4} x^{3}) - 11 \cdot (5 x^{4} x^{4}) - 11 x^{4} (- x^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.4.6

Rewrite using the commutative property of multiplication.

$f'' (x) = - 11 x^{4} - 11 \cdot (- 5 x^{4} x) - 11 \cdot (10 x^{4} x^{2}) - 11 \cdot (- 10 x^{4} x^{3}) - 11 \cdot (5 x^{4} x^{4}) - 11 \cdot (- 1 x^{4} x^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.5

Simplify each term.

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Step 3.7.3.5.1

Multiply $x^{4}$ by $x$ by adding the exponents.

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Step 3.7.3.5.1.1

Move $x$ .

$f'' (x) = - 11 x^{4} - 11 \cdot (- 5 (x \cdot x^{4})) - 11 \cdot (10 x^{4} x^{2}) - 11 \cdot (- 10 x^{4} x^{3}) - 11 \cdot (5 x^{4} x^{4}) - 11 \cdot (- 1 x^{4} x^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.5.1.2

Multiply $x$ by $x^{4}$ .

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Step 3.7.3.5.1.2.1

Raise $x$ to the power of $1$ .

Step 3.7.3.5.1.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = - 11 x^{4} - 11 \cdot (- 5 x^{1 + 4}) - 11 \cdot (10 x^{4} x^{2}) - 11 \cdot (- 10 x^{4} x^{3}) - 11 \cdot (5 x^{4} x^{4}) - 11 \cdot (- 1 x^{4} x^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.5.1.3

Add $1$ and $4$ .

$f'' (x) = - 11 x^{4} - 11 \cdot (- 5 x^{5}) - 11 \cdot (10 x^{4} x^{2}) - 11 \cdot (- 10 x^{4} x^{3}) - 11 \cdot (5 x^{4} x^{4}) - 11 \cdot (- 1 x^{4} x^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.5.2

Multiply $- 11$ by $- 5$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 11 \cdot (10 x^{4} x^{2}) - 11 \cdot (- 10 x^{4} x^{3}) - 11 \cdot (5 x^{4} x^{4}) - 11 \cdot (- 1 x^{4} x^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.5.3

Multiply $x^{4}$ by $x^{2}$ by adding the exponents.

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Step 3.7.3.5.3.1

Move $x^{2}$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 11 \cdot (10 (x^{2} x^{4})) - 11 \cdot (- 10 x^{4} x^{3}) - 11 \cdot (5 x^{4} x^{4}) - 11 \cdot (- 1 x^{4} x^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.5.3.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 11 \cdot (10 x^{2 + 4}) - 11 \cdot (- 10 x^{4} x^{3}) - 11 \cdot (5 x^{4} x^{4}) - 11 \cdot (- 1 x^{4} x^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.5.3.3

Add $2$ and $4$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 11 \cdot (10 x^{6}) - 11 \cdot (- 10 x^{4} x^{3}) - 11 \cdot (5 x^{4} x^{4}) - 11 \cdot (- 1 x^{4} x^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.5.4

Multiply $- 11$ by $10$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} - 11 \cdot (- 10 x^{4} x^{3}) - 11 \cdot (5 x^{4} x^{4}) - 11 \cdot (- 1 x^{4} x^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.5.5

Multiply $x^{4}$ by $x^{3}$ by adding the exponents.

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Step 3.7.3.5.5.1

Move $x^{3}$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} - 11 \cdot (- 10 (x^{3} x^{4})) - 11 \cdot (5 x^{4} x^{4}) - 11 \cdot (- 1 x^{4} x^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.5.5.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} - 11 \cdot (- 10 x^{3 + 4}) - 11 \cdot (5 x^{4} x^{4}) - 11 \cdot (- 1 x^{4} x^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.5.5.3

Add $3$ and $4$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} - 11 \cdot (- 10 x^{7}) - 11 \cdot (5 x^{4} x^{4}) - 11 \cdot (- 1 x^{4} x^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.5.6

Multiply $- 11$ by $- 10$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 11 \cdot (5 x^{4} x^{4}) - 11 \cdot (- 1 x^{4} x^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.5.7

Multiply $x^{4}$ by $x^{4}$ by adding the exponents.

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Step 3.7.3.5.7.1

Move $x^{4}$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 11 \cdot (5 (x^{4} x^{4})) - 11 \cdot (- 1 x^{4} x^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.5.7.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 11 \cdot (5 x^{4 + 4}) - 11 \cdot (- 1 x^{4} x^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.5.7.3

Add $4$ and $4$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 11 \cdot (5 x^{8}) - 11 \cdot (- 1 x^{4} x^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.5.8

Multiply $- 11$ by $5$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} - 11 \cdot (- 1 x^{4} x^{5}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.5.9

Multiply $x^{4}$ by $x^{5}$ by adding the exponents.

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Step 3.7.3.5.9.1

Move $x^{5}$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} - 11 \cdot (- 1 (x^{5} x^{4})) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.5.9.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} - 11 \cdot (- 1 x^{5 + 4}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.5.9.3

Add $5$ and $4$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} - 11 \cdot (- 1 x^{9}) + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.5.10

Multiply $- 11$ by $- 1$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (x^{4} (- 5 {(1 - x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6

Simplify each term.

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Step 3.7.3.6.1

Rewrite using the commutative property of multiplication.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} {(1 - x)}^{4} + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6.2

Use the Binomial Theorem.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} (1^{4} + 4 \cdot (1^{3} (- x)) + 6 \cdot (1^{2} {(- x)}^{2}) + 4 \cdot (1 {(- x)}^{3}) + {(- x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6.3

Simplify each term.

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Step 3.7.3.6.3.1

One to any power is one.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} (1 + 4 \cdot (1^{3} (- x)) + 6 \cdot (1^{2} {(- x)}^{2}) + 4 \cdot (1 {(- x)}^{3}) + {(- x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6.3.2

One to any power is one.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} (1 + 4 \cdot (1 (- x)) + 6 \cdot (1^{2} {(- x)}^{2}) + 4 \cdot (1 {(- x)}^{3}) + {(- x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6.3.3

Multiply $4$ by $1$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} (1 + 4 (- x) + 6 \cdot (1^{2} {(- x)}^{2}) + 4 \cdot (1 {(- x)}^{3}) + {(- x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6.3.4

Multiply $- 1$ by $4$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} (1 - 4 x + 6 \cdot (1^{2} {(- x)}^{2}) + 4 \cdot (1 {(- x)}^{3}) + {(- x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6.3.5

One to any power is one.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} (1 - 4 x + 6 \cdot (1 {(- x)}^{2}) + 4 \cdot (1 {(- x)}^{3}) + {(- x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6.3.6

Multiply $6$ by $1$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} (1 - 4 x + 6 {(- x)}^{2} + 4 \cdot (1 {(- x)}^{3}) + {(- x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6.3.7

Apply the product rule to $- x$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} (1 - 4 x + 6 ({(- 1)}^{2} x^{2}) + 4 \cdot (1 {(- x)}^{3}) + {(- x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6.3.8

Raise $- 1$ to the power of $2$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} (1 - 4 x + 6 (1 x^{2}) + 4 \cdot (1 {(- x)}^{3}) + {(- x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6.3.9

Multiply $x^{2}$ by $1$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} (1 - 4 x + 6 x^{2} + 4 \cdot (1 {(- x)}^{3}) + {(- x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6.3.10

Multiply $4$ by $1$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} (1 - 4 x + 6 x^{2} + 4 {(- x)}^{3} + {(- x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6.3.11

Apply the product rule to $- x$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} (1 - 4 x + 6 x^{2} + 4 ({(- 1)}^{3} x^{3}) + {(- x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6.3.12

Raise $- 1$ to the power of $3$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} (1 - 4 x + 6 x^{2} + 4 (- x^{3}) + {(- x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6.3.13

Multiply $- 1$ by $4$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} (1 - 4 x + 6 x^{2} - 4 x^{3} + {(- x)}^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6.3.14

Apply the product rule to $- x$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} (1 - 4 x + 6 x^{2} - 4 x^{3} + {(- 1)}^{4} x^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6.3.15

Raise $- 1$ to the power of $4$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} (1 - 4 x + 6 x^{2} - 4 x^{3} + 1 x^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6.3.16

Multiply $x^{4}$ by $1$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} (1 - 4 x + 6 x^{2} - 4 x^{3} + x^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6.4

Apply the distributive property.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} \cdot 1 - 5 x^{4} (- 4 x) - 5 x^{4} (6 x^{2}) - 5 x^{4} (- 4 x^{3}) - 5 x^{4} x^{4} + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6.5

Simplify.

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Step 3.7.3.6.5.1

Multiply $- 5$ by $1$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} - 5 x^{4} (- 4 x) - 5 x^{4} (6 x^{2}) - 5 x^{4} (- 4 x^{3}) - 5 x^{4} x^{4} + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6.5.2

Rewrite using the commutative property of multiplication.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} - 5 \cdot (- 4 x^{4} x) - 5 x^{4} (6 x^{2}) - 5 x^{4} (- 4 x^{3}) - 5 x^{4} x^{4} + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6.5.3

Rewrite using the commutative property of multiplication.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} - 5 \cdot (- 4 x^{4} x) - 5 \cdot (6 x^{4} x^{2}) - 5 x^{4} (- 4 x^{3}) - 5 x^{4} x^{4} + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6.5.4

Rewrite using the commutative property of multiplication.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} - 5 \cdot (- 4 x^{4} x) - 5 \cdot (6 x^{4} x^{2}) - 5 \cdot (- 4 x^{4} x^{3}) - 5 x^{4} x^{4} + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6.5.5

Multiply $x^{4}$ by $x^{4}$ by adding the exponents.

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Step 3.7.3.6.5.5.1

Move $x^{4}$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} - 5 \cdot (- 4 x^{4} x) - 5 \cdot (6 x^{4} x^{2}) - 5 \cdot (- 4 x^{4} x^{3}) - 5 (x^{4} x^{4}) + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6.5.5.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} - 5 \cdot (- 4 x^{4} x) - 5 \cdot (6 x^{4} x^{2}) - 5 \cdot (- 4 x^{4} x^{3}) - 5 x^{4 + 4} + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6.5.5.3

Add $4$ and $4$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} - 5 \cdot (- 4 x^{4} x) - 5 \cdot (6 x^{4} x^{2}) - 5 \cdot (- 4 x^{4} x^{3}) - 5 x^{8} + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6.6

Simplify each term.

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Step 3.7.3.6.6.1

Multiply $x^{4}$ by $x$ by adding the exponents.

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Step 3.7.3.6.6.1.1

Move $x$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} - 5 \cdot (- 4 (x \cdot x^{4})) - 5 \cdot (6 x^{4} x^{2}) - 5 \cdot (- 4 x^{4} x^{3}) - 5 x^{8} + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6.6.1.2

Multiply $x$ by $x^{4}$ .

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Step 3.7.3.6.6.1.2.1

Raise $x$ to the power of $1$ .

Step 3.7.3.6.6.1.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} - 5 \cdot (- 4 x^{1 + 4}) - 5 \cdot (6 x^{4} x^{2}) - 5 \cdot (- 4 x^{4} x^{3}) - 5 x^{8} + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6.6.1.3

Add $1$ and $4$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} - 5 \cdot (- 4 x^{5}) - 5 \cdot (6 x^{4} x^{2}) - 5 \cdot (- 4 x^{4} x^{3}) - 5 x^{8} + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6.6.2

Multiply $- 5$ by $- 4$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 5 \cdot (6 x^{4} x^{2}) - 5 \cdot (- 4 x^{4} x^{3}) - 5 x^{8} + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6.6.3

Multiply $x^{4}$ by $x^{2}$ by adding the exponents.

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Step 3.7.3.6.6.3.1

Move $x^{2}$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 5 \cdot (6 (x^{2} x^{4})) - 5 \cdot (- 4 x^{4} x^{3}) - 5 x^{8} + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6.6.3.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 5 \cdot (6 x^{2 + 4}) - 5 \cdot (- 4 x^{4} x^{3}) - 5 x^{8} + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6.6.3.3

Add $2$ and $4$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 5 \cdot (6 x^{6}) - 5 \cdot (- 4 x^{4} x^{3}) - 5 x^{8} + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6.6.4

Multiply $- 5$ by $6$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} - 5 \cdot (- 4 x^{4} x^{3}) - 5 x^{8} + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6.6.5

Multiply $x^{4}$ by $x^{3}$ by adding the exponents.

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Step 3.7.3.6.6.5.1

Move $x^{3}$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} - 5 \cdot (- 4 (x^{3} x^{4})) - 5 x^{8} + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6.6.5.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} - 5 \cdot (- 4 x^{3 + 4}) - 5 x^{8} + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6.6.5.3

Add $3$ and $4$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} - 5 \cdot (- 4 x^{7}) - 5 x^{8} + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6.6.6

Multiply $- 5$ by $- 4$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + 4 {(1 - x)}^{5} x^{3})$

Step 3.7.3.6.7

Use the Binomial Theorem.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + 4 (1^{5} + 5 \cdot (1^{4} (- x)) + 10 \cdot (1^{3} {(- x)}^{2}) + 10 \cdot (1^{2} {(- x)}^{3}) + 5 \cdot (1 {(- x)}^{4}) + {(- x)}^{5}) x^{3})$

Step 3.7.3.6.8

Simplify each term.

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Step 3.7.3.6.8.1

One to any power is one.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + 4 (1 + 5 \cdot (1^{4} (- x)) + 10 \cdot (1^{3} {(- x)}^{2}) + 10 \cdot (1^{2} {(- x)}^{3}) + 5 \cdot (1 {(- x)}^{4}) + {(- x)}^{5}) x^{3})$

Step 3.7.3.6.8.2

One to any power is one.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + 4 (1 + 5 \cdot (1 (- x)) + 10 \cdot (1^{3} {(- x)}^{2}) + 10 \cdot (1^{2} {(- x)}^{3}) + 5 \cdot (1 {(- x)}^{4}) + {(- x)}^{5}) x^{3})$

Step 3.7.3.6.8.3

Multiply $5$ by $1$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + 4 (1 + 5 (- x) + 10 \cdot (1^{3} {(- x)}^{2}) + 10 \cdot (1^{2} {(- x)}^{3}) + 5 \cdot (1 {(- x)}^{4}) + {(- x)}^{5}) x^{3})$

Step 3.7.3.6.8.4

Multiply $- 1$ by $5$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + 4 (1 - 5 x + 10 \cdot (1^{3} {(- x)}^{2}) + 10 \cdot (1^{2} {(- x)}^{3}) + 5 \cdot (1 {(- x)}^{4}) + {(- x)}^{5}) x^{3})$

Step 3.7.3.6.8.5

One to any power is one.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + 4 (1 - 5 x + 10 \cdot (1 {(- x)}^{2}) + 10 \cdot (1^{2} {(- x)}^{3}) + 5 \cdot (1 {(- x)}^{4}) + {(- x)}^{5}) x^{3})$

Step 3.7.3.6.8.6

Multiply $10$ by $1$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + 4 (1 - 5 x + 10 {(- x)}^{2} + 10 \cdot (1^{2} {(- x)}^{3}) + 5 \cdot (1 {(- x)}^{4}) + {(- x)}^{5}) x^{3})$

Step 3.7.3.6.8.7

Apply the product rule to $- x$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + 4 (1 - 5 x + 10 ({(- 1)}^{2} x^{2}) + 10 \cdot (1^{2} {(- x)}^{3}) + 5 \cdot (1 {(- x)}^{4}) + {(- x)}^{5}) x^{3})$

Step 3.7.3.6.8.8

Raise $- 1$ to the power of $2$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + 4 (1 - 5 x + 10 (1 x^{2}) + 10 \cdot (1^{2} {(- x)}^{3}) + 5 \cdot (1 {(- x)}^{4}) + {(- x)}^{5}) x^{3})$

Step 3.7.3.6.8.9

Multiply $x^{2}$ by $1$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + 4 (1 - 5 x + 10 x^{2} + 10 \cdot (1^{2} {(- x)}^{3}) + 5 \cdot (1 {(- x)}^{4}) + {(- x)}^{5}) x^{3})$

Step 3.7.3.6.8.10

One to any power is one.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + 4 (1 - 5 x + 10 x^{2} + 10 \cdot (1 {(- x)}^{3}) + 5 \cdot (1 {(- x)}^{4}) + {(- x)}^{5}) x^{3})$

Step 3.7.3.6.8.11

Multiply $10$ by $1$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + 4 (1 - 5 x + 10 x^{2} + 10 {(- x)}^{3} + 5 \cdot (1 {(- x)}^{4}) + {(- x)}^{5}) x^{3})$

Step 3.7.3.6.8.12

Apply the product rule to $- x$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + 4 (1 - 5 x + 10 x^{2} + 10 ({(- 1)}^{3} x^{3}) + 5 \cdot (1 {(- x)}^{4}) + {(- x)}^{5}) x^{3})$

Step 3.7.3.6.8.13

Raise $- 1$ to the power of $3$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + 4 (1 - 5 x + 10 x^{2} + 10 (- x^{3}) + 5 \cdot (1 {(- x)}^{4}) + {(- x)}^{5}) x^{3})$

Step 3.7.3.6.8.14

Multiply $- 1$ by $10$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + 4 (1 - 5 x + 10 x^{2} - 10 x^{3} + 5 \cdot (1 {(- x)}^{4}) + {(- x)}^{5}) x^{3})$

Step 3.7.3.6.8.15

Multiply $5$ by $1$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + 4 (1 - 5 x + 10 x^{2} - 10 x^{3} + 5 {(- x)}^{4} + {(- x)}^{5}) x^{3})$

Step 3.7.3.6.8.16

Apply the product rule to $- x$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + 4 (1 - 5 x + 10 x^{2} - 10 x^{3} + 5 ({(- 1)}^{4} x^{4}) + {(- x)}^{5}) x^{3})$

Step 3.7.3.6.8.17

Raise $- 1$ to the power of $4$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + 4 (1 - 5 x + 10 x^{2} - 10 x^{3} + 5 (1 x^{4}) + {(- x)}^{5}) x^{3})$

Step 3.7.3.6.8.18

Multiply $x^{4}$ by $1$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + 4 (1 - 5 x + 10 x^{2} - 10 x^{3} + 5 x^{4} + {(- x)}^{5}) x^{3})$

Step 3.7.3.6.8.19

Apply the product rule to $- x$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + 4 (1 - 5 x + 10 x^{2} - 10 x^{3} + 5 x^{4} + {(- 1)}^{5} x^{5}) x^{3})$

Step 3.7.3.6.8.20

Raise $- 1$ to the power of $5$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + 4 (1 - 5 x + 10 x^{2} - 10 x^{3} + 5 x^{4} - x^{5}) x^{3})$

Step 3.7.3.6.9

Apply the distributive property.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + (4 \cdot 1 + 4 (- 5 x) + 4 (10 x^{2}) + 4 (- 10 x^{3}) + 4 (5 x^{4}) + 4 (- x^{5})) x^{3})$

Step 3.7.3.6.10

Simplify.

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Step 3.7.3.6.10.1

Multiply $4$ by $1$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + (4 + 4 (- 5 x) + 4 (10 x^{2}) + 4 (- 10 x^{3}) + 4 (5 x^{4}) + 4 (- x^{5})) x^{3})$

Step 3.7.3.6.10.2

Multiply $- 5$ by $4$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + (4 - 20 x + 4 (10 x^{2}) + 4 (- 10 x^{3}) + 4 (5 x^{4}) + 4 (- x^{5})) x^{3})$

Step 3.7.3.6.10.3

Multiply $10$ by $4$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + (4 - 20 x + 40 x^{2} + 4 (- 10 x^{3}) + 4 (5 x^{4}) + 4 (- x^{5})) x^{3})$

Step 3.7.3.6.10.4

Multiply $- 10$ by $4$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + (4 - 20 x + 40 x^{2} - 40 x^{3} + 4 (5 x^{4}) + 4 (- x^{5})) x^{3})$

Step 3.7.3.6.10.5

Multiply $5$ by $4$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + (4 - 20 x + 40 x^{2} - 40 x^{3} + 20 x^{4} + 4 (- x^{5})) x^{3})$

Step 3.7.3.6.10.6

Multiply $- 1$ by $4$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + (4 - 20 x + 40 x^{2} - 40 x^{3} + 20 x^{4} - 4 x^{5}) x^{3})$

Step 3.7.3.6.11

Apply the distributive property.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + 4 x^{3} - 20 x \cdot x^{3} + 40 x^{2} x^{3} - 40 x^{3} x^{3} + 20 x^{4} x^{3} - 4 x^{5} x^{3})$

Step 3.7.3.6.12

Simplify.

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Step 3.7.3.6.12.1

Multiply $x$ by $x^{3}$ by adding the exponents.

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Step 3.7.3.6.12.1.1

Move $x^{3}$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + 4 x^{3} - 20 (x^{3} x) + 40 x^{2} x^{3} - 40 x^{3} x^{3} + 20 x^{4} x^{3} - 4 x^{5} x^{3})$

Step 3.7.3.6.12.1.2

Multiply $x^{3}$ by $x$ .

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Step 3.7.3.6.12.1.2.1

Raise $x$ to the power of $1$ .

Step 3.7.3.6.12.1.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + 4 x^{3} - 20 x^{3 + 1} + 40 x^{2} x^{3} - 40 x^{3} x^{3} + 20 x^{4} x^{3} - 4 x^{5} x^{3})$

Step 3.7.3.6.12.1.3

Add $3$ and $1$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + 4 x^{3} - 20 x^{4} + 40 x^{2} x^{3} - 40 x^{3} x^{3} + 20 x^{4} x^{3} - 4 x^{5} x^{3})$

Step 3.7.3.6.12.2

Multiply $x^{2}$ by $x^{3}$ by adding the exponents.

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Step 3.7.3.6.12.2.1

Move $x^{3}$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + 4 x^{3} - 20 x^{4} + 40 (x^{3} x^{2}) - 40 x^{3} x^{3} + 20 x^{4} x^{3} - 4 x^{5} x^{3})$

Step 3.7.3.6.12.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + 4 x^{3} - 20 x^{4} + 40 x^{3 + 2} - 40 x^{3} x^{3} + 20 x^{4} x^{3} - 4 x^{5} x^{3})$

Step 3.7.3.6.12.2.3

Add $3$ and $2$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + 4 x^{3} - 20 x^{4} + 40 x^{5} - 40 x^{3} x^{3} + 20 x^{4} x^{3} - 4 x^{5} x^{3})$

Step 3.7.3.6.12.3

Multiply $x^{3}$ by $x^{3}$ by adding the exponents.

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Step 3.7.3.6.12.3.1

Move $x^{3}$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + 4 x^{3} - 20 x^{4} + 40 x^{5} - 40 (x^{3} x^{3}) + 20 x^{4} x^{3} - 4 x^{5} x^{3})$

Step 3.7.3.6.12.3.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + 4 x^{3} - 20 x^{4} + 40 x^{5} - 40 x^{3 + 3} + 20 x^{4} x^{3} - 4 x^{5} x^{3})$

Step 3.7.3.6.12.3.3

Add $3$ and $3$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + 4 x^{3} - 20 x^{4} + 40 x^{5} - 40 x^{6} + 20 x^{4} x^{3} - 4 x^{5} x^{3})$

Step 3.7.3.6.12.4

Multiply $x^{4}$ by $x^{3}$ by adding the exponents.

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Step 3.7.3.6.12.4.1

Move $x^{3}$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + 4 x^{3} - 20 x^{4} + 40 x^{5} - 40 x^{6} + 20 (x^{3} x^{4}) - 4 x^{5} x^{3})$

Step 3.7.3.6.12.4.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + 4 x^{3} - 20 x^{4} + 40 x^{5} - 40 x^{6} + 20 x^{3 + 4} - 4 x^{5} x^{3})$

Step 3.7.3.6.12.4.3

Add $3$ and $4$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + 4 x^{3} - 20 x^{4} + 40 x^{5} - 40 x^{6} + 20 x^{7} - 4 x^{5} x^{3})$

Step 3.7.3.6.12.5

Multiply $x^{5}$ by $x^{3}$ by adding the exponents.

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Step 3.7.3.6.12.5.1

Move $x^{3}$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 5 x^{4} + 20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + 4 x^{3} - 20 x^{4} + 40 x^{5} - 40 x^{6} + 20 x^{7} - 4 (x^{3} x^{5}))$

Step 3.7.3.6.12.5.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

Step 3.7.3.6.12.5.3

Add $3$ and $5$ .

Step 3.7.3.7

Subtract $20 x^{4}$ from $- 5 x^{4}$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (20 x^{5} - 30 x^{6} + 20 x^{7} - 5 x^{8} + 4 x^{3} - 25 x^{4} + 40 x^{5} - 40 x^{6} + 20 x^{7} - 4 x^{8})$

Step 3.7.3.8

Add $20 x^{5}$ and $40 x^{5}$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 30 x^{6} + 20 x^{7} - 5 x^{8} + 4 x^{3} - 25 x^{4} + 60 x^{5} - 40 x^{6} + 20 x^{7} - 4 x^{8})$

Step 3.7.3.9

Subtract $40 x^{6}$ from $- 30 x^{6}$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 70 x^{6} + 20 x^{7} - 5 x^{8} + 4 x^{3} - 25 x^{4} + 60 x^{5} + 20 x^{7} - 4 x^{8})$

Step 3.7.3.10

Add $20 x^{7}$ and $20 x^{7}$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 70 x^{6} + 40 x^{7} - 5 x^{8} + 4 x^{3} - 25 x^{4} + 60 x^{5} - 4 x^{8})$

Step 3.7.3.11

Subtract $4 x^{8}$ from $- 5 x^{8}$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + (- 11 x + 5) (- 70 x^{6} + 40 x^{7} - 9 x^{8} + 4 x^{3} - 25 x^{4} + 60 x^{5})$

Step 3.7.3.12

Expand $(- 11 x + 5) (- 70 x^{6} + 40 x^{7} - 9 x^{8} + 4 x^{3} - 25 x^{4} + 60 x^{5})$ by multiplying each term in the first expression by each term in the second expression.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} - 11 x (- 70 x^{6}) - 11 x (40 x^{7}) - 11 x (- 9 x^{8}) - 11 x (4 x^{3}) - 11 x (- 25 x^{4}) - 11 x (60 x^{5}) + 5 (- 70 x^{6}) + 5 (40 x^{7}) + 5 (- 9 x^{8}) + 5 (4 x^{3}) + 5 (- 25 x^{4}) + 5 (60 x^{5})$

Step 3.7.3.13

Simplify each term.

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Step 3.7.3.13.1

Rewrite using the commutative property of multiplication.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} - 11 \cdot (- 70 x \cdot x^{6}) - 11 x (40 x^{7}) - 11 x (- 9 x^{8}) - 11 x (4 x^{3}) - 11 x (- 25 x^{4}) - 11 x (60 x^{5}) + 5 (- 70 x^{6}) + 5 (40 x^{7}) + 5 (- 9 x^{8}) + 5 (4 x^{3}) + 5 (- 25 x^{4}) + 5 (60 x^{5})$

Step 3.7.3.13.2

Multiply $x$ by $x^{6}$ by adding the exponents.

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Step 3.7.3.13.2.1

Move $x^{6}$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} - 11 \cdot (- 70 (x^{6} x)) - 11 x (40 x^{7}) - 11 x (- 9 x^{8}) - 11 x (4 x^{3}) - 11 x (- 25 x^{4}) - 11 x (60 x^{5}) + 5 (- 70 x^{6}) + 5 (40 x^{7}) + 5 (- 9 x^{8}) + 5 (4 x^{3}) + 5 (- 25 x^{4}) + 5 (60 x^{5})$

Step 3.7.3.13.2.2

Multiply $x^{6}$ by $x$ .

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Step 3.7.3.13.2.2.1

Raise $x$ to the power of $1$ .

Step 3.7.3.13.2.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} - 11 \cdot (- 70 x^{6 + 1}) - 11 x (40 x^{7}) - 11 x (- 9 x^{8}) - 11 x (4 x^{3}) - 11 x (- 25 x^{4}) - 11 x (60 x^{5}) + 5 (- 70 x^{6}) + 5 (40 x^{7}) + 5 (- 9 x^{8}) + 5 (4 x^{3}) + 5 (- 25 x^{4}) + 5 (60 x^{5})$

Step 3.7.3.13.2.3

Add $6$ and $1$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} - 11 \cdot (- 70 x^{7}) - 11 x (40 x^{7}) - 11 x (- 9 x^{8}) - 11 x (4 x^{3}) - 11 x (- 25 x^{4}) - 11 x (60 x^{5}) + 5 (- 70 x^{6}) + 5 (40 x^{7}) + 5 (- 9 x^{8}) + 5 (4 x^{3}) + 5 (- 25 x^{4}) + 5 (60 x^{5})$

Step 3.7.3.13.3

Multiply $- 11$ by $- 70$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + 770 x^{7} - 11 x (40 x^{7}) - 11 x (- 9 x^{8}) - 11 x (4 x^{3}) - 11 x (- 25 x^{4}) - 11 x (60 x^{5}) + 5 (- 70 x^{6}) + 5 (40 x^{7}) + 5 (- 9 x^{8}) + 5 (4 x^{3}) + 5 (- 25 x^{4}) + 5 (60 x^{5})$

Step 3.7.3.13.4

Rewrite using the commutative property of multiplication.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + 770 x^{7} - 11 \cdot (40 x \cdot x^{7}) - 11 x (- 9 x^{8}) - 11 x (4 x^{3}) - 11 x (- 25 x^{4}) - 11 x (60 x^{5}) + 5 (- 70 x^{6}) + 5 (40 x^{7}) + 5 (- 9 x^{8}) + 5 (4 x^{3}) + 5 (- 25 x^{4}) + 5 (60 x^{5})$

Step 3.7.3.13.5

Multiply $x$ by $x^{7}$ by adding the exponents.

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Step 3.7.3.13.5.1

Move $x^{7}$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + 770 x^{7} - 11 \cdot (40 (x^{7} x)) - 11 x (- 9 x^{8}) - 11 x (4 x^{3}) - 11 x (- 25 x^{4}) - 11 x (60 x^{5}) + 5 (- 70 x^{6}) + 5 (40 x^{7}) + 5 (- 9 x^{8}) + 5 (4 x^{3}) + 5 (- 25 x^{4}) + 5 (60 x^{5})$

Step 3.7.3.13.5.2

Multiply $x^{7}$ by $x$ .

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Step 3.7.3.13.5.2.1

Raise $x$ to the power of $1$ .

Step 3.7.3.13.5.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + 770 x^{7} - 11 \cdot (40 x^{7 + 1}) - 11 x (- 9 x^{8}) - 11 x (4 x^{3}) - 11 x (- 25 x^{4}) - 11 x (60 x^{5}) + 5 (- 70 x^{6}) + 5 (40 x^{7}) + 5 (- 9 x^{8}) + 5 (4 x^{3}) + 5 (- 25 x^{4}) + 5 (60 x^{5})$

Step 3.7.3.13.5.3

Add $7$ and $1$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + 770 x^{7} - 11 \cdot (40 x^{8}) - 11 x (- 9 x^{8}) - 11 x (4 x^{3}) - 11 x (- 25 x^{4}) - 11 x (60 x^{5}) + 5 (- 70 x^{6}) + 5 (40 x^{7}) + 5 (- 9 x^{8}) + 5 (4 x^{3}) + 5 (- 25 x^{4}) + 5 (60 x^{5})$

Step 3.7.3.13.6

Multiply $- 11$ by $40$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + 770 x^{7} - 440 x^{8} - 11 x (- 9 x^{8}) - 11 x (4 x^{3}) - 11 x (- 25 x^{4}) - 11 x (60 x^{5}) + 5 (- 70 x^{6}) + 5 (40 x^{7}) + 5 (- 9 x^{8}) + 5 (4 x^{3}) + 5 (- 25 x^{4}) + 5 (60 x^{5})$

Step 3.7.3.13.7

Rewrite using the commutative property of multiplication.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + 770 x^{7} - 440 x^{8} - 11 \cdot (- 9 x \cdot x^{8}) - 11 x (4 x^{3}) - 11 x (- 25 x^{4}) - 11 x (60 x^{5}) + 5 (- 70 x^{6}) + 5 (40 x^{7}) + 5 (- 9 x^{8}) + 5 (4 x^{3}) + 5 (- 25 x^{4}) + 5 (60 x^{5})$

Step 3.7.3.13.8

Multiply $x$ by $x^{8}$ by adding the exponents.

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Step 3.7.3.13.8.1

Move $x^{8}$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + 770 x^{7} - 440 x^{8} - 11 \cdot (- 9 (x^{8} x)) - 11 x (4 x^{3}) - 11 x (- 25 x^{4}) - 11 x (60 x^{5}) + 5 (- 70 x^{6}) + 5 (40 x^{7}) + 5 (- 9 x^{8}) + 5 (4 x^{3}) + 5 (- 25 x^{4}) + 5 (60 x^{5})$

Step 3.7.3.13.8.2

Multiply $x^{8}$ by $x$ .

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Step 3.7.3.13.8.2.1

Raise $x$ to the power of $1$ .

Step 3.7.3.13.8.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + 770 x^{7} - 440 x^{8} - 11 \cdot (- 9 x^{8 + 1}) - 11 x (4 x^{3}) - 11 x (- 25 x^{4}) - 11 x (60 x^{5}) + 5 (- 70 x^{6}) + 5 (40 x^{7}) + 5 (- 9 x^{8}) + 5 (4 x^{3}) + 5 (- 25 x^{4}) + 5 (60 x^{5})$

Step 3.7.3.13.8.3

Add $8$ and $1$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + 770 x^{7} - 440 x^{8} - 11 \cdot (- 9 x^{9}) - 11 x (4 x^{3}) - 11 x (- 25 x^{4}) - 11 x (60 x^{5}) + 5 (- 70 x^{6}) + 5 (40 x^{7}) + 5 (- 9 x^{8}) + 5 (4 x^{3}) + 5 (- 25 x^{4}) + 5 (60 x^{5})$

Step 3.7.3.13.9

Multiply $- 11$ by $- 9$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + 770 x^{7} - 440 x^{8} + 99 x^{9} - 11 x (4 x^{3}) - 11 x (- 25 x^{4}) - 11 x (60 x^{5}) + 5 (- 70 x^{6}) + 5 (40 x^{7}) + 5 (- 9 x^{8}) + 5 (4 x^{3}) + 5 (- 25 x^{4}) + 5 (60 x^{5})$

Step 3.7.3.13.10

Rewrite using the commutative property of multiplication.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + 770 x^{7} - 440 x^{8} + 99 x^{9} - 11 \cdot (4 x \cdot x^{3}) - 11 x (- 25 x^{4}) - 11 x (60 x^{5}) + 5 (- 70 x^{6}) + 5 (40 x^{7}) + 5 (- 9 x^{8}) + 5 (4 x^{3}) + 5 (- 25 x^{4}) + 5 (60 x^{5})$

Step 3.7.3.13.11

Multiply $x$ by $x^{3}$ by adding the exponents.

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Step 3.7.3.13.11.1

Move $x^{3}$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + 770 x^{7} - 440 x^{8} + 99 x^{9} - 11 \cdot (4 (x^{3} x)) - 11 x (- 25 x^{4}) - 11 x (60 x^{5}) + 5 (- 70 x^{6}) + 5 (40 x^{7}) + 5 (- 9 x^{8}) + 5 (4 x^{3}) + 5 (- 25 x^{4}) + 5 (60 x^{5})$

Step 3.7.3.13.11.2

Multiply $x^{3}$ by $x$ .

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Step 3.7.3.13.11.2.1

Raise $x$ to the power of $1$ .

Step 3.7.3.13.11.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + 770 x^{7} - 440 x^{8} + 99 x^{9} - 11 \cdot (4 x^{3 + 1}) - 11 x (- 25 x^{4}) - 11 x (60 x^{5}) + 5 (- 70 x^{6}) + 5 (40 x^{7}) + 5 (- 9 x^{8}) + 5 (4 x^{3}) + 5 (- 25 x^{4}) + 5 (60 x^{5})$

Step 3.7.3.13.11.3

Add $3$ and $1$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + 770 x^{7} - 440 x^{8} + 99 x^{9} - 11 \cdot (4 x^{4}) - 11 x (- 25 x^{4}) - 11 x (60 x^{5}) + 5 (- 70 x^{6}) + 5 (40 x^{7}) + 5 (- 9 x^{8}) + 5 (4 x^{3}) + 5 (- 25 x^{4}) + 5 (60 x^{5})$

Step 3.7.3.13.12

Multiply $- 11$ by $4$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + 770 x^{7} - 440 x^{8} + 99 x^{9} - 44 x^{4} - 11 x (- 25 x^{4}) - 11 x (60 x^{5}) + 5 (- 70 x^{6}) + 5 (40 x^{7}) + 5 (- 9 x^{8}) + 5 (4 x^{3}) + 5 (- 25 x^{4}) + 5 (60 x^{5})$

Step 3.7.3.13.13

Rewrite using the commutative property of multiplication.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + 770 x^{7} - 440 x^{8} + 99 x^{9} - 44 x^{4} - 11 \cdot (- 25 x \cdot x^{4}) - 11 x (60 x^{5}) + 5 (- 70 x^{6}) + 5 (40 x^{7}) + 5 (- 9 x^{8}) + 5 (4 x^{3}) + 5 (- 25 x^{4}) + 5 (60 x^{5})$

Step 3.7.3.13.14

Multiply $x$ by $x^{4}$ by adding the exponents.

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Step 3.7.3.13.14.1

Move $x^{4}$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + 770 x^{7} - 440 x^{8} + 99 x^{9} - 44 x^{4} - 11 \cdot (- 25 (x^{4} x)) - 11 x (60 x^{5}) + 5 (- 70 x^{6}) + 5 (40 x^{7}) + 5 (- 9 x^{8}) + 5 (4 x^{3}) + 5 (- 25 x^{4}) + 5 (60 x^{5})$

Step 3.7.3.13.14.2

Multiply $x^{4}$ by $x$ .

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Step 3.7.3.13.14.2.1

Raise $x$ to the power of $1$ .

Step 3.7.3.13.14.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + 770 x^{7} - 440 x^{8} + 99 x^{9} - 44 x^{4} - 11 \cdot (- 25 x^{4 + 1}) - 11 x (60 x^{5}) + 5 (- 70 x^{6}) + 5 (40 x^{7}) + 5 (- 9 x^{8}) + 5 (4 x^{3}) + 5 (- 25 x^{4}) + 5 (60 x^{5})$

Step 3.7.3.13.14.3

Add $4$ and $1$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + 770 x^{7} - 440 x^{8} + 99 x^{9} - 44 x^{4} - 11 \cdot (- 25 x^{5}) - 11 x (60 x^{5}) + 5 (- 70 x^{6}) + 5 (40 x^{7}) + 5 (- 9 x^{8}) + 5 (4 x^{3}) + 5 (- 25 x^{4}) + 5 (60 x^{5})$

Step 3.7.3.13.15

Multiply $- 11$ by $- 25$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + 770 x^{7} - 440 x^{8} + 99 x^{9} - 44 x^{4} + 275 x^{5} - 11 x (60 x^{5}) + 5 (- 70 x^{6}) + 5 (40 x^{7}) + 5 (- 9 x^{8}) + 5 (4 x^{3}) + 5 (- 25 x^{4}) + 5 (60 x^{5})$

Step 3.7.3.13.16

Rewrite using the commutative property of multiplication.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + 770 x^{7} - 440 x^{8} + 99 x^{9} - 44 x^{4} + 275 x^{5} - 11 \cdot (60 x \cdot x^{5}) + 5 (- 70 x^{6}) + 5 (40 x^{7}) + 5 (- 9 x^{8}) + 5 (4 x^{3}) + 5 (- 25 x^{4}) + 5 (60 x^{5})$

Step 3.7.3.13.17

Multiply $x$ by $x^{5}$ by adding the exponents.

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Step 3.7.3.13.17.1

Move $x^{5}$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + 770 x^{7} - 440 x^{8} + 99 x^{9} - 44 x^{4} + 275 x^{5} - 11 \cdot (60 (x^{5} x)) + 5 (- 70 x^{6}) + 5 (40 x^{7}) + 5 (- 9 x^{8}) + 5 (4 x^{3}) + 5 (- 25 x^{4}) + 5 (60 x^{5})$

Step 3.7.3.13.17.2

Multiply $x^{5}$ by $x$ .

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Step 3.7.3.13.17.2.1

Raise $x$ to the power of $1$ .

Step 3.7.3.13.17.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + 770 x^{7} - 440 x^{8} + 99 x^{9} - 44 x^{4} + 275 x^{5} - 11 \cdot (60 x^{5 + 1}) + 5 (- 70 x^{6}) + 5 (40 x^{7}) + 5 (- 9 x^{8}) + 5 (4 x^{3}) + 5 (- 25 x^{4}) + 5 (60 x^{5})$

Step 3.7.3.13.17.3

Add $5$ and $1$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + 770 x^{7} - 440 x^{8} + 99 x^{9} - 44 x^{4} + 275 x^{5} - 11 \cdot (60 x^{6}) + 5 (- 70 x^{6}) + 5 (40 x^{7}) + 5 (- 9 x^{8}) + 5 (4 x^{3}) + 5 (- 25 x^{4}) + 5 (60 x^{5})$

Step 3.7.3.13.18

Multiply $- 11$ by $60$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + 770 x^{7} - 440 x^{8} + 99 x^{9} - 44 x^{4} + 275 x^{5} - 660 x^{6} + 5 (- 70 x^{6}) + 5 (40 x^{7}) + 5 (- 9 x^{8}) + 5 (4 x^{3}) + 5 (- 25 x^{4}) + 5 (60 x^{5})$

Step 3.7.3.13.19

Multiply $- 70$ by $5$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + 770 x^{7} - 440 x^{8} + 99 x^{9} - 44 x^{4} + 275 x^{5} - 660 x^{6} - 350 x^{6} + 5 (40 x^{7}) + 5 (- 9 x^{8}) + 5 (4 x^{3}) + 5 (- 25 x^{4}) + 5 (60 x^{5})$

Step 3.7.3.13.20

Multiply $40$ by $5$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + 770 x^{7} - 440 x^{8} + 99 x^{9} - 44 x^{4} + 275 x^{5} - 660 x^{6} - 350 x^{6} + 200 x^{7} + 5 (- 9 x^{8}) + 5 (4 x^{3}) + 5 (- 25 x^{4}) + 5 (60 x^{5})$

Step 3.7.3.13.21

Multiply $- 9$ by $5$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + 770 x^{7} - 440 x^{8} + 99 x^{9} - 44 x^{4} + 275 x^{5} - 660 x^{6} - 350 x^{6} + 200 x^{7} - 45 x^{8} + 5 (4 x^{3}) + 5 (- 25 x^{4}) + 5 (60 x^{5})$

Step 3.7.3.13.22

Multiply $4$ by $5$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + 770 x^{7} - 440 x^{8} + 99 x^{9} - 44 x^{4} + 275 x^{5} - 660 x^{6} - 350 x^{6} + 200 x^{7} - 45 x^{8} + 20 x^{3} + 5 (- 25 x^{4}) + 5 (60 x^{5})$

Step 3.7.3.13.23

Multiply $- 25$ by $5$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + 770 x^{7} - 440 x^{8} + 99 x^{9} - 44 x^{4} + 275 x^{5} - 660 x^{6} - 350 x^{6} + 200 x^{7} - 45 x^{8} + 20 x^{3} - 125 x^{4} + 5 (60 x^{5})$

Step 3.7.3.13.24

Multiply $60$ by $5$ .

Step 3.7.3.14

Add $770 x^{7}$ and $200 x^{7}$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + 970 x^{7} - 440 x^{8} + 99 x^{9} - 44 x^{4} + 275 x^{5} - 660 x^{6} - 350 x^{6} - 45 x^{8} + 20 x^{3} - 125 x^{4} + 300 x^{5}$

Step 3.7.3.15

Subtract $45 x^{8}$ from $- 440 x^{8}$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + 970 x^{7} - 485 x^{8} + 99 x^{9} - 44 x^{4} + 275 x^{5} - 660 x^{6} - 350 x^{6} + 20 x^{3} - 125 x^{4} + 300 x^{5}$

Step 3.7.3.16

Subtract $125 x^{4}$ from $- 44 x^{4}$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + 970 x^{7} - 485 x^{8} + 99 x^{9} + 275 x^{5} - 660 x^{6} - 350 x^{6} + 20 x^{3} - 169 x^{4} + 300 x^{5}$

Step 3.7.3.17

Add $275 x^{5}$ and $300 x^{5}$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + 970 x^{7} - 485 x^{8} + 99 x^{9} + 575 x^{5} - 660 x^{6} - 350 x^{6} + 20 x^{3} - 169 x^{4}$

Step 3.7.3.18

Subtract $350 x^{6}$ from $- 660 x^{6}$ .

$f'' (x) = - 11 x^{4} + 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + 970 x^{7} - 485 x^{8} + 99 x^{9} + 575 x^{5} - 1010 x^{6} + 20 x^{3} - 169 x^{4}$

Step 3.7.4

Subtract $169 x^{4}$ from $- 11 x^{4}$ .

$f'' (x) = 55 x^{5} - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + 970 x^{7} - 485 x^{8} + 99 x^{9} + 575 x^{5} - 1010 x^{6} + 20 x^{3} - 180 x^{4}$

Step 3.7.5

Add $55 x^{5}$ and $575 x^{5}$ .

$f'' (x) = - 110 x^{6} + 110 x^{7} - 55 x^{8} + 11 x^{9} + 970 x^{7} - 485 x^{8} + 99 x^{9} + 630 x^{5} - 1010 x^{6} + 20 x^{3} - 180 x^{4}$

Step 3.7.6

Subtract $1010 x^{6}$ from $- 110 x^{6}$ .

$f'' (x) = 110 x^{7} - 55 x^{8} + 11 x^{9} + 970 x^{7} - 485 x^{8} + 99 x^{9} + 630 x^{5} - 1120 x^{6} + 20 x^{3} - 180 x^{4}$

Step 3.7.7

Add $110 x^{7}$ and $970 x^{7}$ .

$f'' (x) = - 55 x^{8} + 11 x^{9} + 1080 x^{7} - 485 x^{8} + 99 x^{9} + 630 x^{5} - 1120 x^{6} + 20 x^{3} - 180 x^{4}$

Step 3.7.8

Subtract $485 x^{8}$ from $- 55 x^{8}$ .

$f'' (x) = - 540 x^{8} + 11 x^{9} + 1080 x^{7} + 99 x^{9} + 630 x^{5} - 1120 x^{6} + 20 x^{3} - 180 x^{4}$

Step 3.7.9

Add $11 x^{9}$ and $99 x^{9}$ .

$f'' (x) = - 540 x^{8} + 110 x^{9} + 1080 x^{7} + 630 x^{5} - 1120 x^{6} + 20 x^{3} - 180 x^{4}$

Step 4

To find the local maximum and minimum values of the function, set the derivative equal to $0$ and solve.

$x^{4} {(1 - x)}^{5} (- 6 x + 5 (1 - x)) = 0$

Step 5

Find the first derivative.

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Step 5.1

Find the first derivative.

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Step 5.1.1

Differentiate using the Product Rule which states that $\frac{d}{d x} [f (x) g (x)]$ is $f (x) \frac{d}{d x} [g (x)] + g (x) \frac{d}{d x} [f (x)]$ where $f (x) = x^{5}$ and $g (x) = {(1 - x)}^{6}$ .

$f' (x) = x^{5} \frac{d}{d x} ({(1 - x)}^{6}) + {(1 - x)}^{6} \frac{d}{d x} (x^{5})$

Step 5.1.2

Differentiate using the chain rule, which states that $\frac{d}{d x} [f (g (x))]$ is $f' (g (x)) g' (x)$ where $f (x) = x^{6}$ and $g (x) = 1 - x$ .

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Step 5.1.2.1

To apply the Chain Rule, set $u$ as $1 - x$ .

$f' (x) = x^{5} (\frac{d}{d u} (u^{6}) \frac{d}{d x} (1 - x)) + {(1 - x)}^{6} \frac{d}{d x} (x^{5})$

Step 5.1.2.2

Differentiate using the Power Rule which states that $\frac{d}{d u} [u^{n}]$ is $n u^{n - 1}$ where $n = 6$ .

$f' (x) = x^{5} (6 u^{5} \frac{d}{d x} (1 - x)) + {(1 - x)}^{6} \frac{d}{d x} (x^{5})$

Step 5.1.2.3

Replace all occurrences of $u$ with $1 - x$ .

$f' (x) = x^{5} (6 {(1 - x)}^{5} \frac{d}{d x} (1 - x)) + {(1 - x)}^{6} \frac{d}{d x} (x^{5})$

Step 5.1.3

Differentiate.

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Step 5.1.3.1

By the Sum Rule, the derivative of $1 - x$ with respect to $x$ is $\frac{d}{d x} [1] + \frac{d}{d x} [- x]$ .

$f' (x) = x^{5} (6 {(1 - x)}^{5} (\frac{d}{d x} (1) + \frac{d}{d x} (- x))) + {(1 - x)}^{6} \frac{d}{d x} (x^{5})$

Step 5.1.3.2

Since $1$ is constant with respect to $x$ , the derivative of $1$ with respect to $x$ is $0$ .

$f' (x) = x^{5} (6 {(1 - x)}^{5} (0 + \frac{d}{d x} (- x))) + {(1 - x)}^{6} \frac{d}{d x} (x^{5})$

Step 5.1.3.3

Add $0$ and $\frac{d}{d x} [- x]$ .

$f' (x) = x^{5} (6 {(1 - x)}^{5} \frac{d}{d x} (- x)) + {(1 - x)}^{6} \frac{d}{d x} (x^{5})$

Step 5.1.3.4

Since $- 1$ is constant with respect to $x$ , the derivative of $- x$ with respect to $x$ is $- \frac{d}{d x} [x]$ .

$f' (x) = x^{5} (6 {(1 - x)}^{5} (- \frac{d}{d x} x)) + {(1 - x)}^{6} \frac{d}{d x} (x^{5})$

Step 5.1.3.5

Multiply $- 1$ by $6$ .

$f' (x) = x^{5} (- 6 {(1 - x)}^{5} \frac{d}{d x} x) + {(1 - x)}^{6} \frac{d}{d x} (x^{5})$

Step 5.1.3.6

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 1$ .

$f' (x) = x^{5} (- 6 {(1 - x)}^{5} \cdot 1) + {(1 - x)}^{6} \frac{d}{d x} (x^{5})$

Step 5.1.3.7

Multiply $- 6$ by $1$ .

$f' (x) = x^{5} (- 6 {(1 - x)}^{5}) + {(1 - x)}^{6} \frac{d}{d x} (x^{5})$

Step 5.1.3.8

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 5$ .

$f' (x) = x^{5} (- 6 {(1 - x)}^{5}) + {(1 - x)}^{6} (5 x^{4})$

Step 5.1.3.9

Move $5$ to the left of ${(1 - x)}^{6}$ .

$f' (x) = x^{5} (- 6 {(1 - x)}^{5}) + 5 \cdot ({(1 - x)}^{6} x^{4})$

Step 5.1.4

Simplify.

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Step 5.1.4.1

Factor $x^{4} {(1 - x)}^{5}$ out of $x^{5} (- 6 {(1 - x)}^{5}) + 5 {(1 - x)}^{6} x^{4}$ .

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Step 5.1.4.1.1

Factor $x^{4} {(1 - x)}^{5}$ out of $x^{5} (- 6 {(1 - x)}^{5})$ .

$f' (x) = x^{4} {(1 - x)}^{5} (x \cdot (- 6)) + 5 {(1 - x)}^{6} x^{4}$

Step 5.1.4.1.2

Factor $x^{4} {(1 - x)}^{5}$ out of $5 {(1 - x)}^{6} x^{4}$ .

$f' (x) = x^{4} {(1 - x)}^{5} (x \cdot (- 6)) + x^{4} {(1 - x)}^{5} (5 (1 - x))$

Step 5.1.4.1.3

Factor $x^{4} {(1 - x)}^{5}$ out of $x^{4} {(1 - x)}^{5} (x \cdot (- 6)) + x^{4} {(1 - x)}^{5} (5 (1 - x))$ .

$f' (x) = x^{4} {(1 - x)}^{5} (x \cdot (- 6) + 5 (1 - x))$

Step 5.1.4.2

Move $- 6$ to the left of $x$ .

$f' (x) = x^{4} {(1 - x)}^{5} (- 6 x + 5 (1 - x))$

Step 5.2

The first derivative of $f (x)$ with respect to $x$ is $x^{4} {(1 - x)}^{5} (- 6 x + 5 (1 - x))$ .

$x^{4} {(1 - x)}^{5} (- 6 x + 5 (1 - x))$

Step 6

Set the first derivative equal to $0$ then solve the equation $x^{4} {(1 - x)}^{5} (- 6 x + 5 (1 - x)) = 0$ .

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Step 6.1

Set the first derivative equal to $0$ .

$x^{4} {(1 - x)}^{5} (- 6 x + 5 (1 - x)) = 0$

Step 6.2

If any individual factor on the left side of the equation is equal to $0$ , the entire expression will be equal to $0$ .

$x^{4} = 0$

${(1 - x)}^{5} = 0$

$- 6 x + 5 (1 - x) = 0$

Step 6.3

Set $x^{4}$ equal to $0$ and solve for $x$ .

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Step 6.3.1

Set $x^{4}$ equal to $0$ .

$x^{4} = 0$

Step 6.3.2

Solve $x^{4} = 0$ for $x$ .

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Step 6.3.2.1

Take the specified root of both sides of the equation to eliminate the exponent on the left side.

$x = \pm \sqrt[4]{0}$

Step 6.3.2.2

Simplify $\pm \sqrt[4]{0}$ .

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Step 6.3.2.2.1

Rewrite $0$ as $0^{4}$ .

$x = \pm \sqrt[4]{0^{4}}$

Step 6.3.2.2.2

Pull terms out from under the radical, assuming positive real numbers.

$x = \pm 0$

Step 6.3.2.2.3

Plus or minus $0$ is $0$ .

$x = 0$

Step 6.4

Set ${(1 - x)}^{5}$ equal to $0$ and solve for $x$ .

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Step 6.4.1

Set ${(1 - x)}^{5}$ equal to $0$ .

${(1 - x)}^{5} = 0$

Step 6.4.2

Solve ${(1 - x)}^{5} = 0$ for $x$ .

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Step 6.4.2.1

Set the $1 - x$ equal to $0$ .

$1 - x = 0$

Step 6.4.2.2

Solve for $x$ .

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Step 6.4.2.2.1

Subtract $1$ from both sides of the equation.

$- x = - 1$

Step 6.4.2.2.2

Divide each term in $- x = - 1$ by $- 1$ and simplify.

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Step 6.4.2.2.2.1

Divide each term in $- x = - 1$ by $- 1$ .

$\frac{- x}{- 1} = \frac{- 1}{- 1}$

Step 6.4.2.2.2.2

Simplify the left side.

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Step 6.4.2.2.2.2.1

Dividing two negative values results in a positive value.

$\frac{x}{1} = \frac{- 1}{- 1}$

Step 6.4.2.2.2.2.2

Divide $x$ by $1$ .

$x = \frac{- 1}{- 1}$

Step 6.4.2.2.2.3

Simplify the right side.

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Step 6.4.2.2.2.3.1

Divide $- 1$ by $- 1$ .

$x = 1$

Step 6.5

Set $- 6 x + 5 (1 - x)$ equal to $0$ and solve for $x$ .

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Step 6.5.1

Set $- 6 x + 5 (1 - x)$ equal to $0$ .

$- 6 x + 5 (1 - x) = 0$

Step 6.5.2

Solve $- 6 x + 5 (1 - x) = 0$ for $x$ .

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Step 6.5.2.1

Simplify $- 6 x + 5 (1 - x)$ .

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Step 6.5.2.1.1

Simplify each term.

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Step 6.5.2.1.1.1

Apply the distributive property.

$- 6 x + 5 \cdot 1 + 5 (- x) = 0$

Step 6.5.2.1.1.2

Multiply $5$ by $1$ .

$- 6 x + 5 + 5 (- x) = 0$

Step 6.5.2.1.1.3

Multiply $- 1$ by $5$ .

$- 6 x + 5 - 5 x = 0$

Step 6.5.2.1.2

Subtract $5 x$ from $- 6 x$ .

$- 11 x + 5 = 0$

Step 6.5.2.2

Subtract $5$ from both sides of the equation.

$- 11 x = - 5$

Step 6.5.2.3

Divide each term in $- 11 x = - 5$ by $- 11$ and simplify.

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Step 6.5.2.3.1

Divide each term in $- 11 x = - 5$ by $- 11$ .

$\frac{- 11 x}{- 11} = \frac{- 5}{- 11}$

Step 6.5.2.3.2

Simplify the left side.

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Step 6.5.2.3.2.1

Cancel the common factor of $- 11$ .

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Step 6.5.2.3.2.1.1

Cancel the common factor.

$\frac{- 11 x}{- 11} = \frac{- 5}{- 11}$

Step 6.5.2.3.2.1.2

Divide $x$ by $1$ .

$x = \frac{- 5}{- 11}$

Step 6.5.2.3.3

Simplify the right side.

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Step 6.5.2.3.3.1

Dividing two negative values results in a positive value.

$x = \frac{5}{11}$

Step 6.6

The final solution is all the values that make $x^{4} {(1 - x)}^{5} (- 6 x + 5 (1 - x)) = 0$ true.

$x = 0, 1, \frac{5}{11}$

Step 7

Find the values where the derivative is undefined.

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Step 7.1

The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined.

Step 8

Critical points to evaluate.

$x = 0, 1, \frac{5}{11}$

Step 9

Evaluate the second derivative at $x = 0$ . If the second derivative is positive, then this is a local minimum. If it is negative, then this is a local maximum.

$- 540 {(0)}^{8} + 110 {(0)}^{9} + 1080 {(0)}^{7} + 630 {(0)}^{5} - 1120 {(0)}^{6} + 20 {(0)}^{3} - 180 {(0)}^{4}$

Step 10

Evaluate the second derivative.

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Step 10.1

Simplify each term.

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Step 10.1.1

Raising $0$ to any positive power yields $0$ .

$- 540 \cdot 0 + 110 {(0)}^{9} + 1080 {(0)}^{7} + 630 {(0)}^{5} - 1120 {(0)}^{6} + 20 {(0)}^{3} - 180 {(0)}^{4}$

Step 10.1.2

Multiply $- 540$ by $0$ .

$0 + 110 {(0)}^{9} + 1080 {(0)}^{7} + 630 {(0)}^{5} - 1120 {(0)}^{6} + 20 {(0)}^{3} - 180 {(0)}^{4}$

Step 10.1.3

Raising $0$ to any positive power yields $0$ .

$0 + 110 \cdot 0 + 1080 {(0)}^{7} + 630 {(0)}^{5} - 1120 {(0)}^{6} + 20 {(0)}^{3} - 180 {(0)}^{4}$

Step 10.1.4

Multiply $110$ by $0$ .

$0 + 0 + 1080 {(0)}^{7} + 630 {(0)}^{5} - 1120 {(0)}^{6} + 20 {(0)}^{3} - 180 {(0)}^{4}$

Step 10.1.5

Raising $0$ to any positive power yields $0$ .

$0 + 0 + 1080 \cdot 0 + 630 {(0)}^{5} - 1120 {(0)}^{6} + 20 {(0)}^{3} - 180 {(0)}^{4}$

Step 10.1.6

Multiply $1080$ by $0$ .

$0 + 0 + 0 + 630 {(0)}^{5} - 1120 {(0)}^{6} + 20 {(0)}^{3} - 180 {(0)}^{4}$

Step 10.1.7

Raising $0$ to any positive power yields $0$ .

$0 + 0 + 0 + 630 \cdot 0 - 1120 {(0)}^{6} + 20 {(0)}^{3} - 180 {(0)}^{4}$

Step 10.1.8

Multiply $630$ by $0$ .

$0 + 0 + 0 + 0 - 1120 {(0)}^{6} + 20 {(0)}^{3} - 180 {(0)}^{4}$

Step 10.1.9

Raising $0$ to any positive power yields $0$ .

$0 + 0 + 0 + 0 - 1120 \cdot 0 + 20 {(0)}^{3} - 180 {(0)}^{4}$

Step 10.1.10

Multiply $- 1120$ by $0$ .

$0 + 0 + 0 + 0 + 0 + 20 {(0)}^{3} - 180 {(0)}^{4}$

Step 10.1.11

Raising $0$ to any positive power yields $0$ .

$0 + 0 + 0 + 0 + 0 + 20 \cdot 0 - 180 {(0)}^{4}$

Step 10.1.12

Multiply $20$ by $0$ .

$0 + 0 + 0 + 0 + 0 + 0 - 180 {(0)}^{4}$

Step 10.1.13

Raising $0$ to any positive power yields $0$ .

$0 + 0 + 0 + 0 + 0 + 0 - 180 \cdot 0$

Step 10.1.14

Multiply $- 180$ by $0$ .

$0 + 0 + 0 + 0 + 0 + 0 + 0$

Step 10.2

Simplify by adding numbers.

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Step 10.2.1

Add $0$ and $0$ .

$0 + 0 + 0 + 0 + 0 + 0$

Step 10.2.2

Add $0$ and $0$ .

$0 + 0 + 0 + 0 + 0$

Step 10.2.3

Add $0$ and $0$ .

$0 + 0 + 0 + 0$

Step 10.2.4

Add $0$ and $0$ .

$0 + 0 + 0$

Step 10.2.5

Add $0$ and $0$ .

$0 + 0$

Step 10.2.6

Add $0$ and $0$ .

$0$

Step 11

Since there is at least one point with $0$ or undefined second derivative, apply the first derivative test.

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Step 11.1

Split $(- \infty, \infty)$ into separate intervals around the $x$ values that make the first derivative $0$ or undefined.

$(- \infty, 0) \cup (0, \frac{5}{11}) \cup (\frac{5}{11}, 1) \cup (1, \infty)$

Step 11.2

Substitute any number, such as $- 2$ , from the interval $(- \infty, 0)$ in the first derivative $x^{4} {(1 - x)}^{5} (- 6 x + 5 (1 - x))$ to check if the result is negative or positive.

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Step 11.2.1

Replace the variable $x$ with $- 2$ in the expression.

$f' (- 2) = {(- 2)}^{4} {(1 - (- 2))}^{5} (- 6 \cdot - 2 + 5 (1 - (- 2)))$

Step 11.2.2

Simplify the result.

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Step 11.2.2.1

Simplify the expression.

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Step 11.2.2.1.1

Raise $- 2$ to the power of $4$ .

$f' (- 2) = 16 {(1 - (- 2))}^{5} (- 6 \cdot - 2 + 5 (1 - (- 2)))$

Step 11.2.2.1.2

Multiply $- 1$ by $- 2$ .

$f' (- 2) = 16 {(1 + 2)}^{5} (- 6 \cdot - 2 + 5 (1 - (- 2)))$

Step 11.2.2.1.3

Add $1$ and $2$ .

$f' (- 2) = 16 \cdot (3^{5} (- 6 \cdot - 2 + 5 (1 - (- 2))))$

Step 11.2.2.1.4

Raise $3$ to the power of $5$ .

$f' (- 2) = 16 \cdot (243 (- 6 \cdot - 2 + 5 (1 - (- 2))))$

Step 11.2.2.1.5

Multiply $16$ by $243$ .

$f' (- 2) = 3888 (- 6 \cdot - 2 + 5 (1 - (- 2)))$

Step 11.2.2.2

Simplify each term.

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Step 11.2.2.2.1

Multiply $- 6$ by $- 2$ .

$f' (- 2) = 3888 (12 + 5 (1 - (- 2)))$

Step 11.2.2.2.2

Multiply $- 1$ by $- 2$ .

$f' (- 2) = 3888 (12 + 5 (1 + 2))$

Step 11.2.2.2.3

Add $1$ and $2$ .

$f' (- 2) = 3888 (12 + 5 \cdot 3)$

Step 11.2.2.2.4

Multiply $5$ by $3$ .

$f' (- 2) = 3888 (12 + 15)$

Step 11.2.2.3

Simplify the expression.

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Step 11.2.2.3.1

Add $12$ and $15$ .

$f' (- 2) = 3888 \cdot 27$

Step 11.2.2.3.2

Multiply $3888$ by $27$ .

$f' (- 2) = 104976$

Step 11.2.2.4

The final answer is $104976$ .

$104976$

Step 11.3

Substitute any number, such as $0.23$ , from the interval $(0, \frac{5}{11})$ in the first derivative $x^{4} {(1 - x)}^{5} (- 6 x + 5 (1 - x))$ to check if the result is negative or positive.

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Step 11.3.1

Replace the variable $x$ with $0.23$ in the expression.

$f' (0.23) = {(0.23)}^{4} {(1 - (0.23))}^{5} (- 6 \cdot 0.23 + 5 (1 - (0.23)))$

Step 11.3.2

Simplify the result.

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Step 11.3.2.1

Simplify the expression.

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Step 11.3.2.1.1

Raise $0.23$ to the power of $4$ .

$f' (0.23) = 0.00279841 {(1 - (0.23))}^{5} (- 6 \cdot 0.23 + 5 (1 - (0.23)))$

Step 11.3.2.1.2

Multiply $- 1$ by $0.23$ .

$f' (0.23) = 0.00279841 {(1 - 0.23)}^{5} (- 6 \cdot 0.23 + 5 (1 - (0.23)))$

Step 11.3.2.1.3

Subtract $0.23$ from $1$ .

$f' (0.23) = 0.00279841 \cdot ({0.77}^{5} (- 6 \cdot 0.23 + 5 (1 - (0.23))))$

Step 11.3.2.1.4

Raise $0.77$ to the power of $5$ .

$f' (0.23) = 0.00279841 \cdot (0.27067841 (- 6 \cdot 0.23 + 5 (1 - (0.23))))$

Step 11.3.2.1.5

Multiply $0.00279841$ by $0.27067841$ .

$f' (0.23) = 0.00075746 (- 6 \cdot 0.23 + 5 (1 - (0.23)))$

Step 11.3.2.2

Simplify each term.

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Step 11.3.2.2.1

Multiply $- 6$ by $0.23$ .

$f' (0.23) = 0.00075746 (- 1.38 + 5 (1 - (0.23)))$

Step 11.3.2.2.2

Multiply $- 1$ by $0.23$ .

$f' (0.23) = 0.00075746 (- 1.38 + 5 (1 - 0.23))$

Step 11.3.2.2.3

Subtract $0.23$ from $1$ .

$f' (0.23) = 0.00075746 (- 1.38 + 5 \cdot 0.77)$

Step 11.3.2.2.4

Multiply $5$ by $0.77$ .

$f' (0.23) = 0.00075746 (- 1.38 + 3.85)$

Step 11.3.2.3

Simplify the expression.

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Step 11.3.2.3.1

Add $- 1.38$ and $3.85$ .

$f' (0.23) = 0.00075746 \cdot 2.47$

Step 11.3.2.3.2

Multiply $0.00075746$ by $2.47$ .

$f' (0.23) = 0.00187094$

Step 11.3.2.4

The final answer is $0.00187094$ .

$0.00187094$

Step 11.4

Substitute any number, such as $0.73$ , from the interval $(\frac{5}{11}, 1)$ in the first derivative $x^{4} {(1 - x)}^{5} (- 6 x + 5 (1 - x))$ to check if the result is negative or positive.

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Step 11.4.1

Replace the variable $x$ with $0.73$ in the expression.

$f' (0.73) = {(0.73)}^{4} {(1 - (0.73))}^{5} (- 6 \cdot 0.73 + 5 (1 - (0.73)))$

Step 11.4.2

Simplify the result.

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Step 11.4.2.1

Simplify the expression.

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Step 11.4.2.1.1

Raise $0.73$ to the power of $4$ .

$f' (0.73) = 0.28398241 {(1 - (0.73))}^{5} (- 6 \cdot 0.73 + 5 (1 - (0.73)))$

Step 11.4.2.1.2

Multiply $- 1$ by $0.73$ .

$f' (0.73) = 0.28398241 {(1 - 0.73)}^{5} (- 6 \cdot 0.73 + 5 (1 - (0.73)))$

Step 11.4.2.1.3

Subtract $0.73$ from $1$ .

$f' (0.73) = 0.28398241 \cdot ({0.27}^{5} (- 6 \cdot 0.73 + 5 (1 - (0.73))))$

Step 11.4.2.1.4

Raise $0.27$ to the power of $5$ .

$f' (0.73) = 0.28398241 \cdot (0.00143489 (- 6 \cdot 0.73 + 5 (1 - (0.73))))$

Step 11.4.2.1.5

Multiply $0.28398241$ by $0.00143489$ .

$f' (0.73) = 0.00040748 (- 6 \cdot 0.73 + 5 (1 - (0.73)))$

Step 11.4.2.2

Simplify each term.

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Step 11.4.2.2.1

Multiply $- 6$ by $0.73$ .

$f' (0.73) = 0.00040748 (- 4.38 + 5 (1 - (0.73)))$

Step 11.4.2.2.2

Multiply $- 1$ by $0.73$ .

$f' (0.73) = 0.00040748 (- 4.38 + 5 (1 - 0.73))$

Step 11.4.2.2.3

Subtract $0.73$ from $1$ .

$f' (0.73) = 0.00040748 (- 4.38 + 5 \cdot 0.27)$

Step 11.4.2.2.4

Multiply $5$ by $0.27$ .

$f' (0.73) = 0.00040748 (- 4.38 + 1.35)$

Step 11.4.2.3

Simplify the expression.

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Step 11.4.2.3.1

Add $- 4.38$ and $1.35$ .

$f' (0.73) = 0.00040748 \cdot - 3.03$

Step 11.4.2.3.2

Multiply $0.00040748$ by $- 3.03$ .

$f' (0.73) = - 0.00123467$

Step 11.4.2.4

The final answer is $- 0.00123467$ .

$- 0.00123467$

Step 11.5

Substitute any number, such as $4$ , from the interval $(1, \infty)$ in the first derivative $x^{4} {(1 - x)}^{5} (- 6 x + 5 (1 - x))$ to check if the result is negative or positive.

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Step 11.5.1

Replace the variable $x$ with $4$ in the expression.

$f' (4) = {(4)}^{4} {(1 - (4))}^{5} (- 6 \cdot 4 + 5 (1 - (4)))$

Step 11.5.2

Simplify the result.

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Step 11.5.2.1

Simplify the expression.

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Step 11.5.2.1.1

Raise $4$ to the power of $4$ .

$f' (4) = 256 {(1 - (4))}^{5} (- 6 \cdot 4 + 5 (1 - (4)))$

Step 11.5.2.1.2

Multiply $- 1$ by $4$ .

$f' (4) = 256 {(1 - 4)}^{5} (- 6 \cdot 4 + 5 (1 - (4)))$

Step 11.5.2.1.3

Subtract $4$ from $1$ .

$f' (4) = 256 {(- 3)}^{5} (- 6 \cdot 4 + 5 (1 - (4)))$

Step 11.5.2.1.4

Raise $- 3$ to the power of $5$ .

$f' (4) = 256 \cdot (- 243 (- 6 \cdot 4 + 5 (1 - (4))))$

Step 11.5.2.1.5

Multiply $256$ by $- 243$ .

$f' (4) = - 62208 (- 6 \cdot 4 + 5 (1 - (4)))$

Step 11.5.2.2

Simplify each term.

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Step 11.5.2.2.1

Multiply $- 6$ by $4$ .

$f' (4) = - 62208 (- 24 + 5 (1 - (4)))$

Step 11.5.2.2.2

Multiply $- 1$ by $4$ .

$f' (4) = - 62208 (- 24 + 5 (1 - 4))$

Step 11.5.2.2.3

Subtract $4$ from $1$ .

$f' (4) = - 62208 (- 24 + 5 \cdot - 3)$

Step 11.5.2.2.4

Multiply $5$ by $- 3$ .

$f' (4) = - 62208 (- 24 - 15)$

Step 11.5.2.3

Simplify the expression.

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Step 11.5.2.3.1

Subtract $15$ from $- 24$ .

$f' (4) = - 62208 \cdot - 39$

Step 11.5.2.3.2

Multiply $- 62208$ by $- 39$ .

$f' (4) = 2426112$

Step 11.5.2.4

The final answer is $2426112$ .

$2426112$

Step 11.6

Since the first derivative did not change signs around $x = 0$ , this is not a local maximum or minimum.

Not a local maximum or minimum

Step 11.7

Since the first derivative changed signs from positive to negative around $x = \frac{5}{11}$ , then $x = \frac{5}{11}$ is a local maximum.

$x = \frac{5}{11}$ is a local maximum

Step 11.8

Since the first derivative changed signs from negative to positive around $x = 1$ , then $x = 1$ is a local minimum.

$x = 1$ is a local minimum

Step 11.9

These are the local extrema for $f (x) = x^{5} {(1 - x)}^{6}$ .

$x = \frac{5}{11}$ is a local maximum

$x = 1$ is a local minimum

$x = \frac{5}{11}$ is a local maximum

$x = 1$ is a local minimum

Step 12