Calculus Examples

$f (x) = \frac{924 + 10 \sqrt{x}}{x}$

Step 1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{x}$ as $x^{\frac{1}{2}}$ .

$\frac{d}{d x} [\frac{924 + 10 x^{\frac{1}{2}}}{x}]$

Step 2

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 $f (x) = 924 + 10 x^{\frac{1}{2}}$ and $g (x) = x$ .

$\frac{x \frac{d}{d x} [924 + 10 x^{\frac{1}{2}}] - (924 + 10 x^{\frac{1}{2}}) \frac{d}{d x} [x]}{x^{2}}$

Step 3

Differentiate.

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Step 3.1

By the Sum Rule, the derivative of $924 + 10 x^{\frac{1}{2}}$ with respect to $x$ is $\frac{d}{d x} [924] + \frac{d}{d x} [10 x^{\frac{1}{2}}]$ .

$\frac{x (\frac{d}{d x} [924] + \frac{d}{d x} [10 x^{\frac{1}{2}}]) - (924 + 10 x^{\frac{1}{2}}) \frac{d}{d x} [x]}{x^{2}}$

Step 3.2

Since $924$ is constant with respect to $x$ , the derivative of $924$ with respect to $x$ is $0$ .

$\frac{x (0 + \frac{d}{d x} [10 x^{\frac{1}{2}}]) - (924 + 10 x^{\frac{1}{2}}) \frac{d}{d x} [x]}{x^{2}}$

Step 3.3

Add $0$ and $\frac{d}{d x} [10 x^{\frac{1}{2}}]$ .

$\frac{x \frac{d}{d x} [10 x^{\frac{1}{2}}] - (924 + 10 x^{\frac{1}{2}}) \frac{d}{d x} [x]}{x^{2}}$

Step 3.4

Since $10$ is constant with respect to $x$ , the derivative of $10 x^{\frac{1}{2}}$ with respect to $x$ is $10 \frac{d}{d x} [x^{\frac{1}{2}}]$ .

$\frac{x (10 \frac{d}{d x} [x^{\frac{1}{2}}]) - (924 + 10 x^{\frac{1}{2}}) \frac{d}{d x} [x]}{x^{2}}$

Step 3.5

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

$\frac{x (10 (\frac{1}{2} x^{\frac{1}{2} - 1})) - (924 + 10 x^{\frac{1}{2}}) \frac{d}{d x} [x]}{x^{2}}$

Step 4

To write $- 1$ as a fraction with a common denominator, multiply by $\frac{2}{2}$ .

$\frac{x (10 (\frac{1}{2} x^{\frac{1}{2} - 1 \cdot \frac{2}{2}})) - (924 + 10 x^{\frac{1}{2}}) \frac{d}{d x} [x]}{x^{2}}$

Step 5

Combine $- 1$ and $\frac{2}{2}$ .

$\frac{x (10 (\frac{1}{2} x^{\frac{1}{2} + \frac{- 1 \cdot 2}{2}})) - (924 + 10 x^{\frac{1}{2}}) \frac{d}{d x} [x]}{x^{2}}$

Step 6

Combine the numerators over the common denominator.

$\frac{x (10 (\frac{1}{2} x^{\frac{1 - 1 \cdot 2}{2}})) - (924 + 10 x^{\frac{1}{2}}) \frac{d}{d x} [x]}{x^{2}}$

Step 7

Simplify the numerator.

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Step 7.1

Multiply $- 1$ by $2$ .

$\frac{x (10 (\frac{1}{2} x^{\frac{1 - 2}{2}})) - (924 + 10 x^{\frac{1}{2}}) \frac{d}{d x} [x]}{x^{2}}$

Step 7.2

Subtract $2$ from $1$ .

$\frac{x (10 (\frac{1}{2} x^{\frac{- 1}{2}})) - (924 + 10 x^{\frac{1}{2}}) \frac{d}{d x} [x]}{x^{2}}$

Step 8

Move the negative in front of the fraction.

$\frac{x (10 (\frac{1}{2} x^{- \frac{1}{2}})) - (924 + 10 x^{\frac{1}{2}}) \frac{d}{d x} [x]}{x^{2}}$

Step 9

Combine $\frac{1}{2}$ and $x^{- \frac{1}{2}}$ .

$\frac{x (10 \frac{x^{- \frac{1}{2}}}{2}) - (924 + 10 x^{\frac{1}{2}}) \frac{d}{d x} [x]}{x^{2}}$

Step 10

Combine $10$ and $\frac{x^{- \frac{1}{2}}}{2}$ .

$\frac{x \frac{10 x^{- \frac{1}{2}}}{2} - (924 + 10 x^{\frac{1}{2}}) \frac{d}{d x} [x]}{x^{2}}$

Step 11

Move $x^{- \frac{1}{2}}$ to the denominator using the negative exponent rule $b^{- n} = \frac{1}{b^{n}}$ .

$\frac{x \frac{10}{2 x^{\frac{1}{2}}} - (924 + 10 x^{\frac{1}{2}}) \frac{d}{d x} [x]}{x^{2}}$

Step 12

Factor $2$ out of $10$ .

$\frac{x \frac{2 \cdot 5}{2 x^{\frac{1}{2}}} - (924 + 10 x^{\frac{1}{2}}) \frac{d}{d x} [x]}{x^{2}}$

Step 13

Cancel the common factors.

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Step 13.1

Factor $2$ out of $2 x^{\frac{1}{2}}$ .

$\frac{x \frac{2 \cdot 5}{2 (x^{\frac{1}{2}})} - (924 + 10 x^{\frac{1}{2}}) \frac{d}{d x} [x]}{x^{2}}$

Step 13.2

Cancel the common factor.

$\frac{x \frac{2 \cdot 5}{2 x^{\frac{1}{2}}} - (924 + 10 x^{\frac{1}{2}}) \frac{d}{d x} [x]}{x^{2}}$

Step 13.3

Rewrite the expression.

$\frac{x \frac{5}{x^{\frac{1}{2}}} - (924 + 10 x^{\frac{1}{2}}) \frac{d}{d x} [x]}{x^{2}}$

Step 14

Combine $x$ and $\frac{5}{x^{\frac{1}{2}}}$ .

$\frac{\frac{x \cdot 5}{x^{\frac{1}{2}}} - (924 + 10 x^{\frac{1}{2}}) \frac{d}{d x} [x]}{x^{2}}$

Step 15

Move $5$ to the left of $x$ .

$\frac{\frac{5 \cdot x}{x^{\frac{1}{2}}} - (924 + 10 x^{\frac{1}{2}}) \frac{d}{d x} [x]}{x^{2}}$

Step 16

Move $x^{\frac{1}{2}}$ to the numerator using the negative exponent rule $\frac{1}{b^{n}} = b^{- n}$ .

$\frac{5 x \cdot x^{- \frac{1}{2}} - (924 + 10 x^{\frac{1}{2}}) \frac{d}{d x} [x]}{x^{2}}$

Step 17

Multiply $x$ by $x^{- \frac{1}{2}}$ by adding the exponents.

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Step 17.1

Move $x^{- \frac{1}{2}}$ .

$\frac{5 (x^{- \frac{1}{2}} x) - (924 + 10 x^{\frac{1}{2}}) \frac{d}{d x} [x]}{x^{2}}$

Step 17.2

Multiply $x^{- \frac{1}{2}}$ by $x$ .

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Step 17.2.1

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

$\frac{5 (x^{- \frac{1}{2}} x^{1}) - (924 + 10 x^{\frac{1}{2}}) \frac{d}{d x} [x]}{x^{2}}$

Step 17.2.2

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

$\frac{5 x^{- \frac{1}{2} + 1} - (924 + 10 x^{\frac{1}{2}}) \frac{d}{d x} [x]}{x^{2}}$

Step 17.3

Write $1$ as a fraction with a common denominator.

$\frac{5 x^{- \frac{1}{2} + \frac{2}{2}} - (924 + 10 x^{\frac{1}{2}}) \frac{d}{d x} [x]}{x^{2}}$

Step 17.4

Combine the numerators over the common denominator.

$\frac{5 x^{\frac{- 1 + 2}{2}} - (924 + 10 x^{\frac{1}{2}}) \frac{d}{d x} [x]}{x^{2}}$

Step 17.5

Add $- 1$ and $2$ .

$\frac{5 x^{\frac{1}{2}} - (924 + 10 x^{\frac{1}{2}}) \frac{d}{d x} [x]}{x^{2}}$

Step 18

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

$\frac{5 x^{\frac{1}{2}} - (924 + 10 x^{\frac{1}{2}}) \cdot 1}{x^{2}}$

Step 19

Multiply $- 1$ by $1$ .

$\frac{5 x^{\frac{1}{2}} - (924 + 10 x^{\frac{1}{2}})}{x^{2}}$

Step 20

Simplify.

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Step 20.1

Apply the distributive property.

$\frac{5 x^{\frac{1}{2}} - 1 \cdot 924 - (10 x^{\frac{1}{2}})}{x^{2}}$

Step 20.2

Simplify the numerator.

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Step 20.2.1

Simplify each term.

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Step 20.2.1.1

Multiply $- 1$ by $924$ .

$\frac{5 x^{\frac{1}{2}} - 924 - (10 x^{\frac{1}{2}})}{x^{2}}$

Step 20.2.1.2

Multiply $10$ by $- 1$ .

$\frac{5 x^{\frac{1}{2}} - 924 - 10 x^{\frac{1}{2}}}{x^{2}}$

Step 20.2.2

Subtract $10 x^{\frac{1}{2}}$ from $5 x^{\frac{1}{2}}$ .

$\frac{- 5 x^{\frac{1}{2}} - 924}{x^{2}}$

Step 20.3

Factor $- 1$ out of $- 5 x^{\frac{1}{2}} - 924$ .

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Step 20.3.1

Factor $- 1$ out of $- 5 x^{\frac{1}{2}}$ .

$\frac{- (5 x^{\frac{1}{2}}) - 924}{x^{2}}$

Step 20.3.2

Rewrite $- 924$ as $- 1 (924)$ .

$\frac{- (5 x^{\frac{1}{2}}) - 1 (924)}{x^{2}}$

Step 20.3.3

Factor $- 1$ out of $- (5 x^{\frac{1}{2}}) - 1 (924)$ .

$\frac{- (5 x^{\frac{1}{2}} + 924)}{x^{2}}$

Step 20.4

Move the negative in front of the fraction.

$- \frac{5 x^{\frac{1}{2}} + 924}{x^{2}}$