Calculus Examples

$y = \frac{{(x - 6)}^{9}}{{(x - 5)}^{6}}$

Step 1

Differentiate using the Quotient Rule which states that $\frac{d}{d x} [\frac{f (x)}{g (x)}]$ is $\frac{g (x) \frac{d}{d x} [f (x)] - f (x) \frac{d}{d x} [g (x)]}{{g (x)}^{2}}$ where $f (x) = {(x - 6)}^{9}$ and $g (x) = {(x - 5)}^{6}$ .

$\frac{{(x - 5)}^{6} \frac{d}{d x} [{(x - 6)}^{9}] - {(x - 6)}^{9} \frac{d}{d x} [{(x - 5)}^{6}]}{{({(x - 5)}^{6})}^{2}}$

Step 2

Differentiate using the chain rule, which states that $\frac{d}{d x} [f (g (x))]$ is $f' (g (x)) g' (x)$ where $f (x) = x^{9}$ and $g (x) = x - 6$ .

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Step 2.1

To apply the Chain Rule, set $u_{1}$ as $x - 6$ .

$\frac{{(x - 5)}^{6} (\frac{d}{d u_{1}} [{u_{1}}^{9}] \frac{d}{d x} [x - 6]) - {(x - 6)}^{9} \frac{d}{d x} [{(x - 5)}^{6}]}{{({(x - 5)}^{6})}^{2}}$

Step 2.2

Differentiate using the Power Rule which states that $\frac{d}{d u_{1}} [{u_{1}}^{n}]$ is $n {u_{1}}^{n - 1}$ where $n = 9$ .

$\frac{{(x - 5)}^{6} (9 {u_{1}}^{8} \frac{d}{d x} [x - 6]) - {(x - 6)}^{9} \frac{d}{d x} [{(x - 5)}^{6}]}{{({(x - 5)}^{6})}^{2}}$

Step 2.3

Replace all occurrences of $u_{1}$ with $x - 6$ .

$\frac{{(x - 5)}^{6} (9 {(x - 6)}^{8} \frac{d}{d x} [x - 6]) - {(x - 6)}^{9} \frac{d}{d x} [{(x - 5)}^{6}]}{{({(x - 5)}^{6})}^{2}}$

Step 3

Differentiate.

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Step 3.1

By the Sum Rule, the derivative of $x - 6$ with respect to $x$ is $\frac{d}{d x} [x] + \frac{d}{d x} [- 6]$ .

$\frac{{(x - 5)}^{6} (9 {(x - 6)}^{8} (\frac{d}{d x} [x] + \frac{d}{d x} [- 6])) - {(x - 6)}^{9} \frac{d}{d x} [{(x - 5)}^{6}]}{{({(x - 5)}^{6})}^{2}}$

Step 3.2

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

$\frac{{(x - 5)}^{6} (9 {(x - 6)}^{8} (1 + \frac{d}{d x} [- 6])) - {(x - 6)}^{9} \frac{d}{d x} [{(x - 5)}^{6}]}{{({(x - 5)}^{6})}^{2}}$

Step 3.3

Since $- 6$ is constant with respect to $x$ , the derivative of $- 6$ with respect to $x$ is $0$ .

$\frac{{(x - 5)}^{6} (9 {(x - 6)}^{8} (1 + 0)) - {(x - 6)}^{9} \frac{d}{d x} [{(x - 5)}^{6}]}{{({(x - 5)}^{6})}^{2}}$

Step 3.4

Simplify the expression.

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Step 3.4.1

Add $1$ and $0$ .

$\frac{{(x - 5)}^{6} (9 {(x - 6)}^{8} \cdot 1) - {(x - 6)}^{9} \frac{d}{d x} [{(x - 5)}^{6}]}{{({(x - 5)}^{6})}^{2}}$

Step 3.4.2

Multiply $9$ by $1$ .

$\frac{{(x - 5)}^{6} (9 {(x - 6)}^{8}) - {(x - 6)}^{9} \frac{d}{d x} [{(x - 5)}^{6}]}{{({(x - 5)}^{6})}^{2}}$

Step 4

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 $g (x) = x - 5$ .

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Step 4.1

To apply the Chain Rule, set $u_{2}$ as $x - 5$ .

$\frac{{(x - 5)}^{6} (9 {(x - 6)}^{8}) - {(x - 6)}^{9} (\frac{d}{d u_{2}} [{u_{2}}^{6}] \frac{d}{d x} [x - 5])}{{({(x - 5)}^{6})}^{2}}$

Step 4.2

Differentiate using the Power Rule which states that $\frac{d}{d u_{2}} [{u_{2}}^{n}]$ is $n {u_{2}}^{n - 1}$ where $n = 6$ .

$\frac{{(x - 5)}^{6} (9 {(x - 6)}^{8}) - {(x - 6)}^{9} (6 {u_{2}}^{5} \frac{d}{d x} [x - 5])}{{({(x - 5)}^{6})}^{2}}$

Step 4.3

Replace all occurrences of $u_{2}$ with $x - 5$ .

$\frac{{(x - 5)}^{6} (9 {(x - 6)}^{8}) - {(x - 6)}^{9} (6 {(x - 5)}^{5} \frac{d}{d x} [x - 5])}{{({(x - 5)}^{6})}^{2}}$

Step 5

Differentiate.

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Step 5.1

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

$\frac{{(x - 5)}^{6} (9 {(x - 6)}^{8}) - {(x - 6)}^{9} (6 {(x - 5)}^{5} (\frac{d}{d x} [x] + \frac{d}{d x} [- 5]))}{{({(x - 5)}^{6})}^{2}}$

Step 5.2

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

$\frac{{(x - 5)}^{6} (9 {(x - 6)}^{8}) - {(x - 6)}^{9} (6 {(x - 5)}^{5} (1 + \frac{d}{d x} [- 5]))}{{({(x - 5)}^{6})}^{2}}$

Step 5.3

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

$\frac{{(x - 5)}^{6} (9 {(x - 6)}^{8}) - {(x - 6)}^{9} (6 {(x - 5)}^{5} (1 + 0))}{{({(x - 5)}^{6})}^{2}}$

Step 5.4

Simplify the expression.

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Step 5.4.1

Add $1$ and $0$ .

$\frac{{(x - 5)}^{6} (9 {(x - 6)}^{8}) - {(x - 6)}^{9} (6 {(x - 5)}^{5} \cdot 1)}{{({(x - 5)}^{6})}^{2}}$

Step 5.4.2

Multiply $6$ by $1$ .

$\frac{{(x - 5)}^{6} (9 {(x - 6)}^{8}) - {(x - 6)}^{9} (6 {(x - 5)}^{5})}{{({(x - 5)}^{6})}^{2}}$

Step 6

Simplify.

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Step 6.1

Simplify the numerator.

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Step 6.1.1

Factor ${(x - 5)}^{5} {(x - 6)}^{8}$ out of ${(x - 5)}^{6} \cdot 9 {(x - 6)}^{8} - {(x - 6)}^{9} (6 {(x - 5)}^{5})$ .

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Step 6.1.1.1

Factor ${(x - 5)}^{5} {(x - 6)}^{8}$ out of ${(x - 5)}^{6} \cdot 9 {(x - 6)}^{8}$ .

$\frac{{(x - 5)}^{5} {(x - 6)}^{8} ((x - 5) \cdot 9) - {(x - 6)}^{9} (6 {(x - 5)}^{5})}{{({(x - 5)}^{6})}^{2}}$

Step 6.1.1.2

Factor ${(x - 5)}^{5} {(x - 6)}^{8}$ out of $- {(x - 6)}^{9} (6 {(x - 5)}^{5})$ .

$\frac{{(x - 5)}^{5} {(x - 6)}^{8} ((x - 5) \cdot 9) + {(x - 5)}^{5} {(x - 6)}^{8} (- (x - 6) \cdot 6)}{{({(x - 5)}^{6})}^{2}}$

Step 6.1.1.3

Factor ${(x - 5)}^{5} {(x - 6)}^{8}$ out of ${(x - 5)}^{5} {(x - 6)}^{8} ((x - 5) \cdot 9) + {(x - 5)}^{5} {(x - 6)}^{8} (- (x - 6) \cdot 6)$ .

$\frac{{(x - 5)}^{5} {(x - 6)}^{8} ((x - 5) \cdot 9 - (x - 6) \cdot 6)}{{({(x - 5)}^{6})}^{2}}$

Step 6.1.2

Multiply $6$ by $- 1$ .

$\frac{{(x - 5)}^{5} {(x - 6)}^{8} ((x - 5) \cdot 9 - 6 (x - 6))}{{({(x - 5)}^{6})}^{2}}$

Step 6.1.3

Simplify each term.

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Step 6.1.3.1

Apply the distributive property.

$\frac{{(x - 5)}^{5} {(x - 6)}^{8} (x \cdot 9 - 5 \cdot 9 - 6 (x - 6))}{{({(x - 5)}^{6})}^{2}}$

Step 6.1.3.2

Move $9$ to the left of $x$ .

$\frac{{(x - 5)}^{5} {(x - 6)}^{8} (9 \cdot x - 5 \cdot 9 - 6 (x - 6))}{{({(x - 5)}^{6})}^{2}}$

Step 6.1.3.3

Multiply $- 5$ by $9$ .

$\frac{{(x - 5)}^{5} {(x - 6)}^{8} (9 \cdot x - 45 - 6 (x - 6))}{{({(x - 5)}^{6})}^{2}}$

Step 6.1.3.4

Apply the distributive property.

$\frac{{(x - 5)}^{5} {(x - 6)}^{8} (9 x - 45 - 6 x - 6 \cdot - 6)}{{({(x - 5)}^{6})}^{2}}$

Step 6.1.3.5

Multiply $- 6$ by $- 6$ .

$\frac{{(x - 5)}^{5} {(x - 6)}^{8} (9 x - 45 - 6 x + 36)}{{({(x - 5)}^{6})}^{2}}$

Step 6.1.4

Subtract $6 x$ from $9 x$ .

$\frac{{(x - 5)}^{5} {(x - 6)}^{8} (3 x - 45 + 36)}{{({(x - 5)}^{6})}^{2}}$

Step 6.1.5

Add $- 45$ and $36$ .

$\frac{{(x - 5)}^{5} {(x - 6)}^{8} (3 x - 9)}{{({(x - 5)}^{6})}^{2}}$

Step 6.1.6

Factor $3$ out of $3 x - 9$ .

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Step 6.1.6.1

Factor $3$ out of $3 x$ .

$\frac{{(x - 5)}^{5} {(x - 6)}^{8} (3 (x) - 9)}{{({(x - 5)}^{6})}^{2}}$

Step 6.1.6.2

Factor $3$ out of $- 9$ .

$\frac{{(x - 5)}^{5} {(x - 6)}^{8} (3 x + 3 \cdot - 3)}{{({(x - 5)}^{6})}^{2}}$

Step 6.1.6.3

Factor $3$ out of $3 x + 3 \cdot - 3$ .

$\frac{{(x - 5)}^{5} {(x - 6)}^{8} (3 (x - 3))}{{({(x - 5)}^{6})}^{2}}$

$\frac{{(x - 5)}^{5} {(x - 6)}^{8} \cdot 3 (x - 3)}{{({(x - 5)}^{6})}^{2}}$

Step 6.2

Combine terms.

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Step 6.2.1

Move $3$ to the left of ${(x - 5)}^{5} {(x - 6)}^{8}$ .

$\frac{3 \cdot ({(x - 5)}^{5} {(x - 6)}^{8}) (x - 3)}{{({(x - 5)}^{6})}^{2}}$

Step 6.2.2

Multiply the exponents in ${({(x - 5)}^{6})}^{2}$ .

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Step 6.2.2.1

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$\frac{3 {(x - 5)}^{5} {(x - 6)}^{8} (x - 3)}{{(x - 5)}^{6 \cdot 2}}$

Step 6.2.2.2

Multiply $6$ by $2$ .

$\frac{3 {(x - 5)}^{5} {(x - 6)}^{8} (x - 3)}{{(x - 5)}^{12}}$

Step 6.2.3

Cancel the common factor of ${(x - 5)}^{5}$ and ${(x - 5)}^{12}$ .

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Step 6.2.3.1

Factor ${(x - 5)}^{5}$ out of $3 {(x - 5)}^{5} {(x - 6)}^{8} (x - 3)$ .

$\frac{{(x - 5)}^{5} (3 {(x - 6)}^{8} (x - 3))}{{(x - 5)}^{12}}$

Step 6.2.3.2

Cancel the common factors.

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Step 6.2.3.2.1

Factor ${(x - 5)}^{5}$ out of ${(x - 5)}^{12}$ .

$\frac{{(x - 5)}^{5} (3 {(x - 6)}^{8} (x - 3))}{{(x - 5)}^{5} {(x - 5)}^{7}}$

Step 6.2.3.2.2

Cancel the common factor.

$\frac{{(x - 5)}^{5} (3 {(x - 6)}^{8} (x - 3))}{{(x - 5)}^{5} {(x - 5)}^{7}}$

Step 6.2.3.2.3

Rewrite the expression.

$\frac{3 {(x - 6)}^{8} (x - 3)}{{(x - 5)}^{7}}$