Calculus Examples

$6 \sqrt{\frac{1}{x} + 8 x^{4}}$

Step 1

Differentiate using the Constant Multiple Rule.

Tap for more steps...

Step 1.1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{\frac{1}{x} + 8 x^{4}}$ as ${(\frac{1}{x} + 8 x^{4})}^{\frac{1}{2}}$ .

$\frac{d}{d x} [6 {(\frac{1}{x} + 8 x^{4})}^{\frac{1}{2}}]$

Step 1.2

Since $6$ is constant with respect to $x$ , the derivative of $6 {(\frac{1}{x} + 8 x^{4})}^{\frac{1}{2}}$ with respect to $x$ is $6 \frac{d}{d x} [{(\frac{1}{x} + 8 x^{4})}^{\frac{1}{2}}]$ .

$6 \frac{d}{d x} [{(\frac{1}{x} + 8 x^{4})}^{\frac{1}{2}}]$

Step 2

Differentiate using the chain rule, which states that $\frac{d}{d x} [f (g (x))]$ is $f' (g (x)) g' (x)$ where $f (x) = x^{\frac{1}{2}}$ and $g (x) = \frac{1}{x} + 8 x^{4}$ .

Tap for more steps...

Step 2.1

To apply the Chain Rule, set $u$ as $\frac{1}{x} + 8 x^{4}$ .

$6 (\frac{d}{d u} [u^{\frac{1}{2}}] \frac{d}{d x} [\frac{1}{x} + 8 x^{4}])$

Step 2.2

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

$6 (\frac{1}{2} u^{\frac{1}{2} - 1} \frac{d}{d x} [\frac{1}{x} + 8 x^{4}])$

Step 2.3

Replace all occurrences of $u$ with $\frac{1}{x} + 8 x^{4}$ .

$6 (\frac{1}{2} {(\frac{1}{x} + 8 x^{4})}^{\frac{1}{2} - 1} \frac{d}{d x} [\frac{1}{x} + 8 x^{4}])$

Step 3

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

$6 (\frac{1}{2} {(\frac{1}{x} + 8 x^{4})}^{\frac{1}{2} - 1 \cdot \frac{2}{2}} \frac{d}{d x} [\frac{1}{x} + 8 x^{4}])$

Step 4

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

$6 (\frac{1}{2} {(\frac{1}{x} + 8 x^{4})}^{\frac{1}{2} + \frac{- 1 \cdot 2}{2}} \frac{d}{d x} [\frac{1}{x} + 8 x^{4}])$

Step 5

Combine the numerators over the common denominator.

$6 (\frac{1}{2} {(\frac{1}{x} + 8 x^{4})}^{\frac{1 - 1 \cdot 2}{2}} \frac{d}{d x} [\frac{1}{x} + 8 x^{4}])$

Step 6

Simplify the numerator.

Tap for more steps...

Step 6.1

Multiply $- 1$ by $2$ .

$6 (\frac{1}{2} {(\frac{1}{x} + 8 x^{4})}^{\frac{1 - 2}{2}} \frac{d}{d x} [\frac{1}{x} + 8 x^{4}])$

Step 6.2

Subtract $2$ from $1$ .

$6 (\frac{1}{2} {(\frac{1}{x} + 8 x^{4})}^{\frac{- 1}{2}} \frac{d}{d x} [\frac{1}{x} + 8 x^{4}])$

Step 7

Move the negative in front of the fraction.

$6 (\frac{1}{2} {(\frac{1}{x} + 8 x^{4})}^{- \frac{1}{2}} \frac{d}{d x} [\frac{1}{x} + 8 x^{4}])$

Step 8

Combine $\frac{1}{2}$ and ${(\frac{1}{x} + 8 x^{4})}^{- \frac{1}{2}}$ .

$6 (\frac{{(\frac{1}{x} + 8 x^{4})}^{- \frac{1}{2}}}{2} \frac{d}{d x} [\frac{1}{x} + 8 x^{4}])$

Step 9

Move ${(\frac{1}{x} + 8 x^{4})}^{- \frac{1}{2}}$ to the denominator using the negative exponent rule $b^{- n} = \frac{1}{b^{n}}$ .

$6 (\frac{1}{2 {(\frac{1}{x} + 8 x^{4})}^{\frac{1}{2}}} \frac{d}{d x} [\frac{1}{x} + 8 x^{4}])$

Step 10

Combine $\frac{1}{2 {(\frac{1}{x} + 8 x^{4})}^{\frac{1}{2}}}$ and $6$ .

$\frac{6}{2 {(\frac{1}{x} + 8 x^{4})}^{\frac{1}{2}}} \frac{d}{d x} [\frac{1}{x} + 8 x^{4}]$

Step 11

Factor $2$ out of $6$ .

$\frac{2 \cdot 3}{2 {(\frac{1}{x} + 8 x^{4})}^{\frac{1}{2}}} \frac{d}{d x} [\frac{1}{x} + 8 x^{4}]$

Step 12

Cancel the common factors.

Tap for more steps...

Step 12.1

Factor $2$ out of $2 {(\frac{1}{x} + 8 x^{4})}^{\frac{1}{2}}$ .

$\frac{2 \cdot 3}{2 ({(\frac{1}{x} + 8 x^{4})}^{\frac{1}{2}})} \frac{d}{d x} [\frac{1}{x} + 8 x^{4}]$

Step 12.2

Cancel the common factor.

$\frac{2 \cdot 3}{2 {(\frac{1}{x} + 8 x^{4})}^{\frac{1}{2}}} \frac{d}{d x} [\frac{1}{x} + 8 x^{4}]$

Step 12.3

Rewrite the expression.

$\frac{3}{{(\frac{1}{x} + 8 x^{4})}^{\frac{1}{2}}} \frac{d}{d x} [\frac{1}{x} + 8 x^{4}]$

Step 13

By the Sum Rule, the derivative of $\frac{1}{x} + 8 x^{4}$ with respect to $x$ is $\frac{d}{d x} [\frac{1}{x}] + \frac{d}{d x} [8 x^{4}]$ .

$\frac{3}{{(\frac{1}{x} + 8 x^{4})}^{\frac{1}{2}}} (\frac{d}{d x} [\frac{1}{x}] + \frac{d}{d x} [8 x^{4}])$

Step 14

Rewrite $\frac{1}{x}$ as $x^{- 1}$ .

$\frac{3}{{(\frac{1}{x} + 8 x^{4})}^{\frac{1}{2}}} (\frac{d}{d x} [x^{- 1}] + \frac{d}{d x} [8 x^{4}])$

Step 15

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

$\frac{3}{{(\frac{1}{x} + 8 x^{4})}^{\frac{1}{2}}} (- x^{- 2} + \frac{d}{d x} [8 x^{4}])$

Step 16

Since $8$ is constant with respect to $x$ , the derivative of $8 x^{4}$ with respect to $x$ is $8 \frac{d}{d x} [x^{4}]$ .

$\frac{3}{{(\frac{1}{x} + 8 x^{4})}^{\frac{1}{2}}} (- x^{- 2} + 8 \frac{d}{d x} [x^{4}])$

Step 17

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

$\frac{3}{{(\frac{1}{x} + 8 x^{4})}^{\frac{1}{2}}} (- x^{- 2} + 8 (4 x^{3}))$

Step 18

Multiply $4$ by $8$ .

$\frac{3}{{(\frac{1}{x} + 8 x^{4})}^{\frac{1}{2}}} (- x^{- 2} + 32 x^{3})$

Step 19

Simplify.

Tap for more steps...

Step 19.1

Rewrite the expression using the negative exponent rule $b^{- n} = \frac{1}{b^{n}}$ .

$\frac{3}{{(\frac{1}{x} + 8 x^{4})}^{\frac{1}{2}}} (- \frac{1}{x^{2}} + 32 x^{3})$

Step 19.2

Reorder the factors of $\frac{3}{{(\frac{1}{x} + 8 x^{4})}^{\frac{1}{2}}} (- \frac{1}{x^{2}} + 32 x^{3})$ .

$(- \frac{1}{x^{2}} + 32 x^{3}) \frac{3}{{(\frac{1}{x} + 8 x^{4})}^{\frac{1}{2}}}$

Step 19.3

Simplify the denominator.

Tap for more steps...

Step 19.3.1

To write $8 x^{4}$ as a fraction with a common denominator, multiply by $\frac{x}{x}$ .

$(- \frac{1}{x^{2}} + 32 x^{3}) \frac{3}{{(\frac{1}{x} + \frac{8 x^{4} x}{x})}^{\frac{1}{2}}}$

Step 19.3.2

Combine the numerators over the common denominator.

$(- \frac{1}{x^{2}} + 32 x^{3}) \frac{3}{{(\frac{1 + 8 x^{4} x}{x})}^{\frac{1}{2}}}$

Step 19.3.3

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

Tap for more steps...

Step 19.3.3.1

Move $x$ .

$(- \frac{1}{x^{2}} + 32 x^{3}) \frac{3}{{(\frac{1 + 8 (x \cdot x^{4})}{x})}^{\frac{1}{2}}}$

Step 19.3.3.2

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

Tap for more steps...

Step 19.3.3.2.1

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

$(- \frac{1}{x^{2}} + 32 x^{3}) \frac{3}{{(\frac{1 + 8 (x^{1} x^{4})}{x})}^{\frac{1}{2}}}$

Step 19.3.3.2.2

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

$(- \frac{1}{x^{2}} + 32 x^{3}) \frac{3}{{(\frac{1 + 8 x^{1 + 4}}{x})}^{\frac{1}{2}}}$

Step 19.3.3.3

Add $1$ and $4$ .

$(- \frac{1}{x^{2}} + 32 x^{3}) \frac{3}{{(\frac{1 + 8 x^{5}}{x})}^{\frac{1}{2}}}$

Step 19.3.4

Apply the product rule to $\frac{1 + 8 x^{5}}{x}$ .

$(- \frac{1}{x^{2}} + 32 x^{3}) \frac{3}{\frac{{(1 + 8 x^{5})}^{\frac{1}{2}}}{x^{\frac{1}{2}}}}$

Step 19.4

Multiply the numerator by the reciprocal of the denominator.

$(- \frac{1}{x^{2}} + 32 x^{3}) (3 \frac{x^{\frac{1}{2}}}{{(1 + 8 x^{5})}^{\frac{1}{2}}})$

Step 19.5

Combine $3$ and $\frac{x^{\frac{1}{2}}}{{(1 + 8 x^{5})}^{\frac{1}{2}}}$ .

$(- \frac{1}{x^{2}} + 32 x^{3}) \frac{3 x^{\frac{1}{2}}}{{(1 + 8 x^{5})}^{\frac{1}{2}}}$

Step 19.6

Multiply $- \frac{1}{x^{2}} + 32 x^{3}$ by $\frac{3 x^{\frac{1}{2}}}{{(1 + 8 x^{5})}^{\frac{1}{2}}}$ .

$\frac{(- \frac{1}{x^{2}} + 32 x^{3}) (3 x^{\frac{1}{2}})}{{(1 + 8 x^{5})}^{\frac{1}{2}}}$

Step 19.7

Simplify the numerator.

Tap for more steps...

Step 19.7.1

To write $32 x^{3}$ as a fraction with a common denominator, multiply by $\frac{x^{2}}{x^{2}}$ .

$\frac{(- \frac{1}{x^{2}} + \frac{32 x^{3} x^{2}}{x^{2}}) \cdot 3 x^{\frac{1}{2}}}{{(1 + 8 x^{5})}^{\frac{1}{2}}}$

Step 19.7.2

Combine the numerators over the common denominator.

$\frac{\frac{- 1 + 32 x^{3} x^{2}}{x^{2}} \cdot 3 x^{\frac{1}{2}}}{{(1 + 8 x^{5})}^{\frac{1}{2}}}$

Step 19.7.3

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

Tap for more steps...

Step 19.7.3.1

Move $x^{2}$ .

$\frac{\frac{- 1 + 32 (x^{2} x^{3})}{x^{2}} \cdot 3 x^{\frac{1}{2}}}{{(1 + 8 x^{5})}^{\frac{1}{2}}}$

Step 19.7.3.2

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

$\frac{\frac{- 1 + 32 x^{2 + 3}}{x^{2}} \cdot 3 x^{\frac{1}{2}}}{{(1 + 8 x^{5})}^{\frac{1}{2}}}$

Step 19.7.3.3

Add $2$ and $3$ .

$\frac{\frac{- 1 + 32 x^{5}}{x^{2}} \cdot 3 x^{\frac{1}{2}}}{{(1 + 8 x^{5})}^{\frac{1}{2}}}$

Step 19.7.4

Combine exponents.

Tap for more steps...

Step 19.7.4.1

Combine $\frac{- 1 + 32 x^{5}}{x^{2}}$ and $3$ .

$\frac{\frac{(- 1 + 32 x^{5}) \cdot 3}{x^{2}} x^{\frac{1}{2}}}{{(1 + 8 x^{5})}^{\frac{1}{2}}}$

Step 19.7.4.2

Combine $\frac{(- 1 + 32 x^{5}) \cdot 3}{x^{2}}$ and $x^{\frac{1}{2}}$ .

$\frac{\frac{(- 1 + 32 x^{5}) \cdot 3 x^{\frac{1}{2}}}{x^{2}}}{{(1 + 8 x^{5})}^{\frac{1}{2}}}$

Step 19.7.5

Reduce the expression by cancelling the common factors.

Tap for more steps...

Step 19.7.5.1

Reduce the expression $\frac{(- 1 + 32 x^{5}) \cdot 3 x^{\frac{1}{2}}}{x^{2}}$ by cancelling the common factors.

Tap for more steps...

Step 19.7.5.1.1

Factor $x^{2}$ out of $(- 1 + 32 x^{5}) \cdot 3 x^{\frac{1}{2}}$ .

$\frac{\frac{x^{2} ((- 1 + 32 x^{5}) \cdot 3 x^{\frac{- 3}{2}})}{x^{2}}}{{(1 + 8 x^{5})}^{\frac{1}{2}}}$

Step 19.7.5.1.2

Multiply by $1$ .

$\frac{\frac{x^{2} ((- 1 + 32 x^{5}) \cdot 3 x^{\frac{- 3}{2}})}{x^{2} \cdot 1}}{{(1 + 8 x^{5})}^{\frac{1}{2}}}$

Step 19.7.5.1.3

Cancel the common factor.

$\frac{\frac{x^{2} ((- 1 + 32 x^{5}) \cdot 3 x^{\frac{- 3}{2}})}{x^{2} \cdot 1}}{{(1 + 8 x^{5})}^{\frac{1}{2}}}$

Step 19.7.5.1.4

Rewrite the expression.

$\frac{\frac{(- 1 + 32 x^{5}) \cdot 3 x^{\frac{- 3}{2}}}{1}}{{(1 + 8 x^{5})}^{\frac{1}{2}}}$

Step 19.7.5.2

Divide $(- 1 + 32 x^{5}) \cdot 3 x^{\frac{- 3}{2}}$ by $1$ .

$\frac{(- 1 + 32 x^{5}) \cdot 3 x^{\frac{- 3}{2}}}{{(1 + 8 x^{5})}^{\frac{1}{2}}}$

Step 19.7.6

Move the negative in front of the fraction.

$\frac{(- 1 + 32 x^{5}) \cdot 3 x^{- \frac{3}{2}}}{{(1 + 8 x^{5})}^{\frac{1}{2}}}$

Step 19.7.7

Rewrite the expression using the negative exponent rule $b^{- n} = \frac{1}{b^{n}}$ .

$\frac{(- 1 + 32 x^{5}) \cdot 3 \frac{1}{x^{\frac{3}{2}}}}{{(1 + 8 x^{5})}^{\frac{1}{2}}}$

Step 19.7.8

Combine $\frac{1}{x^{\frac{3}{2}}}$ and $3$ .

$\frac{(- 1 + 32 x^{5}) \cdot \frac{3}{x^{\frac{3}{2}}}}{{(1 + 8 x^{5})}^{\frac{1}{2}}}$

Step 19.8

Factor $\frac{3}{x^{\frac{3}{2}}}$ out of $\frac{(- 1 + 32 x^{5}) \cdot \frac{3}{x^{\frac{3}{2}}}}{{(1 + 8 x^{5})}^{\frac{1}{2}}}$ .

$\frac{3}{x^{\frac{3}{2}}} \cdot \frac{- 1 + 32 x^{5}}{{(1 + 8 x^{5})}^{\frac{1}{2}}}$

Step 19.9

Multiply $\frac{3}{x^{\frac{3}{2}}}$ by $\frac{- 1 + 32 x^{5}}{{(1 + 8 x^{5})}^{\frac{1}{2}}}$ .

$\frac{3 (- 1 + 32 x^{5})}{x^{\frac{3}{2}} {(1 + 8 x^{5})}^{\frac{1}{2}}}$

Step 19.10

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

$\frac{3 (- 1 (1) + 32 x^{5})}{x^{\frac{3}{2}} {(1 + 8 x^{5})}^{\frac{1}{2}}}$

Step 19.11

Factor $- 1$ out of $32 x^{5}$ .

$\frac{3 (- 1 (1) - (- 32 x^{5}))}{x^{\frac{3}{2}} {(1 + 8 x^{5})}^{\frac{1}{2}}}$

Step 19.12

Factor $- 1$ out of $- 1 (1) - (- 32 x^{5})$ .

$\frac{3 (- 1 (1 - 32 x^{5}))}{x^{\frac{3}{2}} {(1 + 8 x^{5})}^{\frac{1}{2}}}$

Step 19.13

Move the negative in front of the fraction.

$- \frac{3 (1 - 32 x^{5})}{x^{\frac{3}{2}} {(1 + 8 x^{5})}^{\frac{1}{2}}}$