Calculus Examples

$y = - \frac{\frac{x^{- \frac{26}{9}}}{x^{\frac{1}{9}}} - 18 \ln (x^{\frac{1}{9}}) x^{- 3} + 2 x^{- 3}}{9}$ , $x = 8$

Step 1

Move $x^{- \frac{26}{9}}$ to the denominator using the negative exponent rule $b^{- n} = \frac{1}{b^{n}}$ .

$\frac{d}{d x} [- \frac{\frac{1}{x^{\frac{1}{9}} x^{\frac{26}{9}}} - 18 \ln (x^{\frac{1}{9}}) x^{- 3} + 2 x^{- 3}}{9}]$

Step 2

Multiply $x^{\frac{1}{9}}$ by $x^{\frac{26}{9}}$ by adding the exponents.

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Step 2.1

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

$\frac{d}{d x} [- \frac{\frac{1}{x^{\frac{1}{9} + \frac{26}{9}}} - 18 \ln (x^{\frac{1}{9}}) x^{- 3} + 2 x^{- 3}}{9}]$

Step 2.2

Combine the numerators over the common denominator.

$\frac{d}{d x} [- \frac{\frac{1}{x^{\frac{1 + 26}{9}}} - 18 \ln (x^{\frac{1}{9}}) x^{- 3} + 2 x^{- 3}}{9}]$

Step 2.3

Add $1$ and $26$ .

$\frac{d}{d x} [- \frac{\frac{1}{x^{\frac{27}{9}}} - 18 \ln (x^{\frac{1}{9}}) x^{- 3} + 2 x^{- 3}}{9}]$

Step 2.4

Divide $27$ by $9$ .

$\frac{d}{d x} [- \frac{\frac{1}{x^{3}} - 18 \ln (x^{\frac{1}{9}}) x^{- 3} + 2 x^{- 3}}{9}]$

Step 3

Multiply $\frac{\frac{1}{x^{3}} - 18 \ln (x^{\frac{1}{9}}) x^{- 3} + 2 x^{- 3}}{9}$ by $\frac{x^{3}}{x^{3}}$ .

$\frac{d}{d x} [- (\frac{x^{3}}{x^{3}} \cdot \frac{\frac{1}{x^{3}} - 18 \ln (x^{\frac{1}{9}}) x^{- 3} + 2 x^{- 3}}{9})]$

Step 4

Combine.

$\frac{d}{d x} [- \frac{x^{3} (\frac{1}{x^{3}} - 18 \ln (x^{\frac{1}{9}}) x^{- 3} + 2 x^{- 3})}{x^{3} \cdot 9}]$

Step 5

Apply the distributive property.

$\frac{d}{d x} [- \frac{x^{3} \frac{1}{x^{3}} + x^{3} (- 18 \ln (x^{\frac{1}{9}}) x^{- 3}) + x^{3} (2 x^{- 3})}{x^{3} \cdot 9}]$

Step 6

Cancel the common factor of $x^{3}$ .

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Step 6.1

Cancel the common factor.

$\frac{d}{d x} [- \frac{x^{3} \frac{1}{x^{3}} + x^{3} (- 18 \ln (x^{\frac{1}{9}}) x^{- 3}) + x^{3} (2 x^{- 3})}{x^{3} \cdot 9}]$

Step 6.2

Rewrite the expression.

$\frac{d}{d x} [- \frac{1 + x^{3} (- 18 \ln (x^{\frac{1}{9}}) x^{- 3}) + x^{3} (2 x^{- 3})}{x^{3} \cdot 9}]$

Step 7

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

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Step 7.1

Move $x^{- 3}$ .

$\frac{d}{d x} [- \frac{1 + x^{- 3} x^{3} (- 18 \ln (x^{\frac{1}{9}})) + x^{3} (2 x^{- 3})}{x^{3} \cdot 9}]$

Step 7.2

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

$\frac{d}{d x} [- \frac{1 + x^{- 3 + 3} (- 18 \ln (x^{\frac{1}{9}})) + x^{3} (2 x^{- 3})}{x^{3} \cdot 9}]$

Step 7.3

Add $- 3$ and $3$ .

$\frac{d}{d x} [- \frac{1 + x^{0} (- 18 \ln (x^{\frac{1}{9}})) + x^{3} (2 x^{- 3})}{x^{3} \cdot 9}]$

Step 8

Simplify $x^{0} (- 18 \ln (x^{\frac{1}{9}}))$ .

$\frac{d}{d x} [- \frac{1 - 18 \ln (x^{\frac{1}{9}}) + x^{3} (2 x^{- 3})}{x^{3} \cdot 9}]$

Step 9

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

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Step 9.1

Move $x^{- 3}$ .

$\frac{d}{d x} [- \frac{1 - 18 \ln (x^{\frac{1}{9}}) + x^{- 3} x^{3} \cdot 2}{x^{3} \cdot 9}]$

Step 9.2

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

$\frac{d}{d x} [- \frac{1 - 18 \ln (x^{\frac{1}{9}}) + x^{- 3 + 3} \cdot 2}{x^{3} \cdot 9}]$

Step 9.3

Add $- 3$ and $3$ .

$\frac{d}{d x} [- \frac{1 - 18 \ln (x^{\frac{1}{9}}) + x^{0} \cdot 2}{x^{3} \cdot 9}]$

Step 10

Simplify the expression.

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Step 10.1

Simplify $x^{0} \cdot 2$ .

$\frac{d}{d x} [- \frac{1 - 18 \ln (x^{\frac{1}{9}}) + 2}{x^{3} \cdot 9}]$

Step 10.2

Add $1$ and $2$ .

$\frac{d}{d x} [- \frac{3 - 18 \ln (x^{\frac{1}{9}})}{x^{3} \cdot 9}]$

Step 10.3

Move $9$ to the left of $x^{3}$ .

$\frac{d}{d x} [- \frac{3 - 18 \ln (x^{\frac{1}{9}})}{9 \cdot x^{3}}]$

Step 11

Factor $3$ out of $3$ .

$\frac{d}{d x} [- \frac{3 (1) - 18 \ln (x^{\frac{1}{9}})}{9 x^{3}}]$

Step 12

Factor $3$ out of $- 18 \ln (x^{\frac{1}{9}})$ .

$\frac{d}{d x} [- \frac{3 (1) + 3 (- 6 \ln (x^{\frac{1}{9}}))}{9 x^{3}}]$

Step 13

Factor $3$ out of $3 (1) + 3 (- 6 \ln (x^{\frac{1}{9}}))$ .

$\frac{d}{d x} [- \frac{3 (1 - 6 \ln (x^{\frac{1}{9}}))}{9 x^{3}}]$

Step 14

Cancel the common factors.

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Step 14.1

Factor $3$ out of $9 x^{3}$ .

$\frac{d}{d x} [- \frac{3 (1 - 6 \ln (x^{\frac{1}{9}}))}{3 (3 x^{3})}]$

Step 14.2

Cancel the common factor.

$\frac{d}{d x} [- \frac{3 (1 - 6 \ln (x^{\frac{1}{9}}))}{3 (3 x^{3})}]$

Step 14.3

Rewrite the expression.

$\frac{d}{d x} [- \frac{1 - 6 \ln (x^{\frac{1}{9}})}{3 x^{3}}]$

Step 15

Since $- \frac{1}{3}$ is constant with respect to $x$ , the derivative of $- \frac{1 - 6 \ln (x^{\frac{1}{9}})}{3 x^{3}}$ with respect to $x$ is $- \frac{1}{3} \frac{d}{d x} [\frac{1 - 6 \ln (x^{\frac{1}{9}})}{x^{3}}]$ .

$- \frac{1}{3} \frac{d}{d x} [\frac{1 - 6 \ln (x^{\frac{1}{9}})}{x^{3}}]$

Step 16

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 $f (x) = 1 - 6 \ln (x^{\frac{1}{9}})$ and $g (x) = x^{3}$ .

$- \frac{1}{3} \cdot \frac{x^{3} \frac{d}{d x} [1 - 6 \ln (x^{\frac{1}{9}})] - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{{(x^{3})}^{2}}$

Step 17

Differentiate.

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Step 17.1

Multiply the exponents in ${(x^{3})}^{2}$ .

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Step 17.1.1

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

$- \frac{1}{3} \cdot \frac{x^{3} \frac{d}{d x} [1 - 6 \ln (x^{\frac{1}{9}})] - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{3 \cdot 2}}$

Step 17.1.2

Multiply $3$ by $2$ .

$- \frac{1}{3} \cdot \frac{x^{3} \frac{d}{d x} [1 - 6 \ln (x^{\frac{1}{9}})] - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 17.2

By the Sum Rule, the derivative of $1 - 6 \ln (x^{\frac{1}{9}})$ with respect to $x$ is $\frac{d}{d x} [1] + \frac{d}{d x} [- 6 \ln (x^{\frac{1}{9}})]$ .

$- \frac{1}{3} \cdot \frac{x^{3} (\frac{d}{d x} [1] + \frac{d}{d x} [- 6 \ln (x^{\frac{1}{9}})]) - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 17.3

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

$- \frac{1}{3} \cdot \frac{x^{3} (0 + \frac{d}{d x} [- 6 \ln (x^{\frac{1}{9}})]) - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 17.4

Add $0$ and $\frac{d}{d x} [- 6 \ln (x^{\frac{1}{9}})]$ .

$- \frac{1}{3} \cdot \frac{x^{3} \frac{d}{d x} [- 6 \ln (x^{\frac{1}{9}})] - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 17.5

Since $- 6$ is constant with respect to $x$ , the derivative of $- 6 \ln (x^{\frac{1}{9}})$ with respect to $x$ is $- 6 \frac{d}{d x} [\ln (x^{\frac{1}{9}})]$ .

$- \frac{1}{3} \cdot \frac{x^{3} (- 6 \frac{d}{d x} [\ln (x^{\frac{1}{9}})]) - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 18

Differentiate using the chain rule, which states that $\frac{d}{d x} [f (g (x))]$ is $f' (g (x)) g' (x)$ where $f (x) = \ln (x)$ and $g (x) = x^{\frac{1}{9}}$ .

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Step 18.1

To apply the Chain Rule, set $u$ as $x^{\frac{1}{9}}$ .

$- \frac{1}{3} \cdot \frac{x^{3} (- 6 (\frac{d}{d u} [\ln (u)] \frac{d}{d x} [x^{\frac{1}{9}}])) - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 18.2

The derivative of $\ln (u)$ with respect to $u$ is $\frac{1}{u}$ .

$- \frac{1}{3} \cdot \frac{x^{3} (- 6 (\frac{1}{u} \frac{d}{d x} [x^{\frac{1}{9}}])) - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 18.3

Replace all occurrences of $u$ with $x^{\frac{1}{9}}$ .

$- \frac{1}{3} \cdot \frac{x^{3} (- 6 (\frac{1}{x^{\frac{1}{9}}} \frac{d}{d x} [x^{\frac{1}{9}}])) - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 19

Combine fractions.

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Step 19.1

Combine $\frac{1}{x^{\frac{1}{9}}}$ and $- 6$ .

$- \frac{1}{3} \cdot \frac{x^{3} (\frac{- 6}{x^{\frac{1}{9}}} \frac{d}{d x} [x^{\frac{1}{9}}]) - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 19.2

Move the negative in front of the fraction.

$- \frac{1}{3} \cdot \frac{x^{3} (- \frac{6}{x^{\frac{1}{9}}} \frac{d}{d x} [x^{\frac{1}{9}}]) - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 19.3

Combine $x^{3}$ and $\frac{6}{x^{\frac{1}{9}}}$ .

$- \frac{1}{3} \cdot \frac{- \frac{x^{3} \cdot 6}{x^{\frac{1}{9}}} \frac{d}{d x} [x^{\frac{1}{9}}] - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 19.4

Move $6$ to the left of $x^{3}$ .

$- \frac{1}{3} \cdot \frac{- \frac{6 \cdot x^{3}}{x^{\frac{1}{9}}} \frac{d}{d x} [x^{\frac{1}{9}}] - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 20

Move $x^{\frac{1}{9}}$ to the numerator using the negative exponent rule $\frac{1}{b^{n}} = b^{- n}$ .

$- \frac{1}{3} \cdot \frac{- (6 x^{3} x^{- \frac{1}{9}}) \frac{d}{d x} [x^{\frac{1}{9}}] - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 21

Multiply $x^{3}$ by $x^{- \frac{1}{9}}$ by adding the exponents.

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Step 21.1

Move $x^{- \frac{1}{9}}$ .

$- \frac{1}{3} \cdot \frac{- (6 (x^{- \frac{1}{9}} x^{3})) \frac{d}{d x} [x^{\frac{1}{9}}] - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 21.2

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

$- \frac{1}{3} \cdot \frac{- (6 x^{- \frac{1}{9} + 3}) \frac{d}{d x} [x^{\frac{1}{9}}] - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 21.3

To write $3$ as a fraction with a common denominator, multiply by $\frac{9}{9}$ .

$- \frac{1}{3} \cdot \frac{- (6 x^{- \frac{1}{9} + 3 \cdot \frac{9}{9}}) \frac{d}{d x} [x^{\frac{1}{9}}] - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 21.4

Combine $3$ and $\frac{9}{9}$ .

$- \frac{1}{3} \cdot \frac{- (6 x^{- \frac{1}{9} + \frac{3 \cdot 9}{9}}) \frac{d}{d x} [x^{\frac{1}{9}}] - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 21.5

Combine the numerators over the common denominator.

$- \frac{1}{3} \cdot \frac{- (6 x^{\frac{- 1 + 3 \cdot 9}{9}}) \frac{d}{d x} [x^{\frac{1}{9}}] - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 21.6

Simplify the numerator.

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Step 21.6.1

Multiply $3$ by $9$ .

$- \frac{1}{3} \cdot \frac{- (6 x^{\frac{- 1 + 27}{9}}) \frac{d}{d x} [x^{\frac{1}{9}}] - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 21.6.2

Add $- 1$ and $27$ .

$- \frac{1}{3} \cdot \frac{- (6 x^{\frac{26}{9}}) \frac{d}{d x} [x^{\frac{1}{9}}] - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 22

Multiply $6$ by $- 1$ .

$- \frac{1}{3} \cdot \frac{- 6 x^{\frac{26}{9}} \frac{d}{d x} [x^{\frac{1}{9}}] - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 23

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

$- \frac{1}{3} \cdot \frac{- 6 x^{\frac{26}{9}} (\frac{1}{9} x^{\frac{1}{9} - 1}) - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 24

To write $- 1$ as a fraction with a common denominator, multiply by $\frac{9}{9}$ .

$- \frac{1}{3} \cdot \frac{- 6 x^{\frac{26}{9}} (\frac{1}{9} x^{\frac{1}{9} - 1 \cdot \frac{9}{9}}) - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 25

Combine $- 1$ and $\frac{9}{9}$ .

$- \frac{1}{3} \cdot \frac{- 6 x^{\frac{26}{9}} (\frac{1}{9} x^{\frac{1}{9} + \frac{- 1 \cdot 9}{9}}) - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 26

Combine the numerators over the common denominator.

$- \frac{1}{3} \cdot \frac{- 6 x^{\frac{26}{9}} (\frac{1}{9} x^{\frac{1 - 1 \cdot 9}{9}}) - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 27

Simplify the numerator.

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Step 27.1

Multiply $- 1$ by $9$ .

$- \frac{1}{3} \cdot \frac{- 6 x^{\frac{26}{9}} (\frac{1}{9} x^{\frac{1 - 9}{9}}) - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 27.2

Subtract $9$ from $1$ .

$- \frac{1}{3} \cdot \frac{- 6 x^{\frac{26}{9}} (\frac{1}{9} x^{\frac{- 8}{9}}) - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 28

Move the negative in front of the fraction.

$- \frac{1}{3} \cdot \frac{- 6 x^{\frac{26}{9}} (\frac{1}{9} x^{- \frac{8}{9}}) - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 29

Combine $\frac{1}{9}$ and $x^{- \frac{8}{9}}$ .

$- \frac{1}{3} \cdot \frac{- 6 x^{\frac{26}{9}} \frac{x^{- \frac{8}{9}}}{9} - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 30

Combine $- 6$ and $\frac{x^{- \frac{8}{9}}}{9}$ .

$- \frac{1}{3} \cdot \frac{x^{\frac{26}{9}} \frac{- 6 x^{- \frac{8}{9}}}{9} - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 31

Combine $x^{\frac{26}{9}}$ and $\frac{- 6 x^{- \frac{8}{9}}}{9}$ .

$- \frac{1}{3} \cdot \frac{\frac{x^{\frac{26}{9}} (- 6 x^{- \frac{8}{9}})}{9} - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 32

Multiply $x^{\frac{26}{9}}$ by $x^{- \frac{8}{9}}$ by adding the exponents.

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Step 32.1

Move $x^{- \frac{8}{9}}$ .

$- \frac{1}{3} \cdot \frac{\frac{x^{- \frac{8}{9}} x^{\frac{26}{9}} \cdot - 6}{9} - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 32.2

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

$- \frac{1}{3} \cdot \frac{\frac{x^{- \frac{8}{9} + \frac{26}{9}} \cdot - 6}{9} - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 32.3

Combine the numerators over the common denominator.

$- \frac{1}{3} \cdot \frac{\frac{x^{\frac{- 8 + 26}{9}} \cdot - 6}{9} - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 32.4

Add $- 8$ and $26$ .

$- \frac{1}{3} \cdot \frac{\frac{x^{\frac{18}{9}} \cdot - 6}{9} - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 32.5

Divide $18$ by $9$ .

$- \frac{1}{3} \cdot \frac{\frac{x^{2} \cdot - 6}{9} - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 33

Reduce the expression by cancelling the common factors.

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Step 33.1

Move $- 6$ to the left of $x^{2}$ .

$- \frac{1}{3} \cdot \frac{\frac{- 6 \cdot x^{2}}{9} - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 33.2

Cancel the common factor of $- 6$ and $9$ .

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Step 33.2.1

Factor $3$ out of $- 6 x^{2}$ .

$- \frac{1}{3} \cdot \frac{\frac{3 (- 2 x^{2})}{9} - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 33.2.2

Cancel the common factors.

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Step 33.2.2.1

Factor $3$ out of $9$ .

$- \frac{1}{3} \cdot \frac{\frac{3 (- 2 x^{2})}{3 (3)} - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 33.2.2.2

Cancel the common factor.

$- \frac{1}{3} \cdot \frac{\frac{3 (- 2 x^{2})}{3 \cdot 3} - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 33.2.2.3

Rewrite the expression.

$- \frac{1}{3} \cdot \frac{\frac{- 2 x^{2}}{3} - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 33.3

Move the negative in front of the fraction.

$- \frac{1}{3} \cdot \frac{- \frac{2 x^{2}}{3} - (1 - 6 \ln (x^{\frac{1}{9}})) \frac{d}{d x} [x^{3}]}{x^{6}}$

Step 34

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 3$ .

$- \frac{1}{3} \cdot \frac{- \frac{2 x^{2}}{3} - (1 - 6 \ln (x^{\frac{1}{9}})) (3 x^{2})}{x^{6}}$

Step 35

Multiply $3$ by $- 1$ .

$- \frac{1}{3} \cdot \frac{- \frac{2 x^{2}}{3} - 3 (1 - 6 \ln (x^{\frac{1}{9}})) x^{2}}{x^{6}}$

Step 36

To write $- 3 (1 - 6 \ln (x^{\frac{1}{9}})) x^{2}$ as a fraction with a common denominator, multiply by $\frac{3}{3}$ .

$- \frac{1}{3} \cdot \frac{- \frac{2 x^{2}}{3} - 3 (1 - 6 \ln (x^{\frac{1}{9}})) x^{2} \cdot \frac{3}{3}}{x^{6}}$

Step 37

Combine $- 3 (1 - 6 \ln (x^{\frac{1}{9}})) x^{2}$ and $\frac{3}{3}$ .

$- \frac{1}{3} \cdot \frac{- \frac{2 x^{2}}{3} + \frac{- 3 (1 - 6 \ln (x^{\frac{1}{9}})) x^{2} \cdot 3}{3}}{x^{6}}$

Step 38

Combine the numerators over the common denominator.

$- \frac{1}{3} \cdot \frac{\frac{- 2 x^{2} - 3 (1 - 6 \ln (x^{\frac{1}{9}})) x^{2} \cdot 3}{3}}{x^{6}}$

Step 39

Multiply $3$ by $- 3$ .

$- \frac{1}{3} \cdot \frac{\frac{- 2 x^{2} - 9 (1 - 6 \ln (x^{\frac{1}{9}})) x^{2}}{3}}{x^{6}}$

Step 40

Rewrite $\frac{\frac{- 2 x^{2} - 9 (1 - 6 \ln (x^{\frac{1}{9}})) x^{2}}{3}}{x^{6}}$ as a product.

$- \frac{1}{3} (\frac{- 2 x^{2} - 9 (1 - 6 \ln (x^{\frac{1}{9}})) x^{2}}{3} \cdot \frac{1}{x^{6}})$

Step 41

Multiply $\frac{- 2 x^{2} - 9 (1 - 6 \ln (x^{\frac{1}{9}})) x^{2}}{3}$ by $\frac{1}{x^{6}}$ .

$- \frac{1}{3} \cdot \frac{- 2 x^{2} - 9 (1 - 6 \ln (x^{\frac{1}{9}})) x^{2}}{3 x^{6}}$

Step 42

Multiply $\frac{- 2 x^{2} - 9 (1 - 6 \ln (x^{\frac{1}{9}})) x^{2}}{3 x^{6}}$ by $\frac{1}{3}$ .

$- \frac{- 2 x^{2} - 9 (1 - 6 \ln (x^{\frac{1}{9}})) x^{2}}{3 x^{6} \cdot 3}$

Step 43

Multiply $3$ by $3$ .

$- \frac{- 2 x^{2} - 9 (1 - 6 \ln (x^{\frac{1}{9}})) x^{2}}{9 x^{6}}$

Step 44

Simplify.

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Step 44.1

Apply the distributive property.

$- \frac{- 2 x^{2} + (- 9 \cdot 1 - 9 (- 6 \ln (x^{\frac{1}{9}}))) x^{2}}{9 x^{6}}$

Step 44.2

Apply the distributive property.

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

Step 44.3

Simplify the numerator.

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Step 44.3.1

Simplify each term.

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Step 44.3.1.1

Multiply $- 9$ by $1$ .

$- \frac{- 2 x^{2} - 9 x^{2} - 9 (- 6 \ln (x^{\frac{1}{9}})) x^{2}}{9 x^{6}}$

Step 44.3.1.2

Simplify $- 6 \ln (x^{\frac{1}{9}})$ by moving $6$ inside the logarithm.

$- \frac{- 2 x^{2} - 9 x^{2} - 9 (- \ln ({(x^{\frac{1}{9}})}^{6})) x^{2}}{9 x^{6}}$

Step 44.3.1.3

Multiply the exponents in ${(x^{\frac{1}{9}})}^{6}$ .

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Step 44.3.1.3.1

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

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

Step 44.3.1.3.2

Cancel the common factor of $3$ .

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Step 44.3.1.3.2.1

Factor $3$ out of $9$ .

$- \frac{- 2 x^{2} - 9 x^{2} - 9 (- \ln (x^{\frac{1}{3 (3)} \cdot 6})) x^{2}}{9 x^{6}}$

Step 44.3.1.3.2.2

Factor $3$ out of $6$ .

$- \frac{- 2 x^{2} - 9 x^{2} - 9 (- \ln (x^{\frac{1}{3 \cdot 3} \cdot (3 \cdot 2)})) x^{2}}{9 x^{6}}$

Step 44.3.1.3.2.3

Cancel the common factor.

$- \frac{- 2 x^{2} - 9 x^{2} - 9 (- \ln (x^{\frac{1}{3 \cdot 3} \cdot (3 \cdot 2)})) x^{2}}{9 x^{6}}$

Step 44.3.1.3.2.4

Rewrite the expression.

$- \frac{- 2 x^{2} - 9 x^{2} - 9 (- \ln (x^{\frac{1}{3} \cdot 2})) x^{2}}{9 x^{6}}$

Step 44.3.1.3.3

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

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

Step 44.3.1.4

Multiply $- 9 (- \ln (x^{\frac{2}{3}}))$ .

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Step 44.3.1.4.1

Multiply $- 1$ by $- 9$ .

$- \frac{- 2 x^{2} - 9 x^{2} + 9 \ln (x^{\frac{2}{3}}) x^{2}}{9 x^{6}}$

Step 44.3.1.4.2

Simplify $9 \ln (x^{\frac{2}{3}})$ by moving $9$ inside the logarithm.

$- \frac{- 2 x^{2} - 9 x^{2} + \ln ({(x^{\frac{2}{3}})}^{9}) x^{2}}{9 x^{6}}$

Step 44.3.1.5

Multiply the exponents in ${(x^{\frac{2}{3}})}^{9}$ .

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Step 44.3.1.5.1

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

$- \frac{- 2 x^{2} - 9 x^{2} + \ln (x^{\frac{2}{3} \cdot 9}) x^{2}}{9 x^{6}}$

Step 44.3.1.5.2

Cancel the common factor of $3$ .

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Step 44.3.1.5.2.1

Factor $3$ out of $9$ .

$- \frac{- 2 x^{2} - 9 x^{2} + \ln (x^{\frac{2}{3} \cdot (3 (3))}) x^{2}}{9 x^{6}}$

Step 44.3.1.5.2.2

Cancel the common factor.

$- \frac{- 2 x^{2} - 9 x^{2} + \ln (x^{\frac{2}{3} \cdot (3 \cdot 3)}) x^{2}}{9 x^{6}}$

Step 44.3.1.5.2.3

Rewrite the expression.

$- \frac{- 2 x^{2} - 9 x^{2} + \ln (x^{2 \cdot 3}) x^{2}}{9 x^{6}}$

Step 44.3.1.5.3

Multiply $2$ by $3$ .

$- \frac{- 2 x^{2} - 9 x^{2} + \ln (x^{6}) x^{2}}{9 x^{6}}$

Step 44.3.2

Subtract $9 x^{2}$ from $- 2 x^{2}$ .

$- \frac{- 11 x^{2} + \ln (x^{6}) x^{2}}{9 x^{6}}$

Step 44.3.3

Reorder factors in $- 11 x^{2} + \ln (x^{6}) x^{2}$ .

$- \frac{- 11 x^{2} + x^{2} \ln (x^{6})}{9 x^{6}}$

Step 44.4

Factor $x^{2}$ out of $- 11 x^{2} + x^{2} \ln (x^{6})$ .

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Step 44.4.1

Factor $x^{2}$ out of $- 11 x^{2}$ .

$- \frac{x^{2} \cdot - 11 + x^{2} \ln (x^{6})}{9 x^{6}}$

Step 44.4.2

Factor $x^{2}$ out of $x^{2} \ln (x^{6})$ .

$- \frac{x^{2} \cdot - 11 + x^{2} (\ln (x^{6}))}{9 x^{6}}$

Step 44.4.3

Factor $x^{2}$ out of $x^{2} \cdot - 11 + x^{2} (\ln (x^{6}))$ .

$- \frac{x^{2} (- 11 + \ln (x^{6}))}{9 x^{6}}$

Step 44.5

Expand $\ln (x^{6})$ by moving $6$ outside the logarithm.

$- \frac{x^{2} (- 11 + 6 \ln (x))}{9 x^{6}}$

Step 44.6

Cancel the common factors.

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Step 44.6.1

Factor $x^{2}$ out of $9 x^{6}$ .

$- \frac{x^{2} (- 11 + 6 \ln (x))}{x^{2} (9 x^{4})}$

Step 44.6.2

Cancel the common factor.

$- \frac{x^{2} (- 11 + 6 \ln (x))}{x^{2} (9 x^{4})}$

Step 44.6.3

Rewrite the expression.

$- \frac{- 11 + 6 \ln (x)}{9 x^{4}}$

Step 44.7

Rewrite $- 11$ as $- 1 (11)$ .

$- \frac{- 1 (11) + 6 \ln (x)}{9 x^{4}}$

Step 44.8

Factor $- 1$ out of $6 \ln (x)$ .

$- \frac{- 1 (11) - (- 6 \ln (x))}{9 x^{4}}$

Step 44.9

Factor $- 1$ out of $- 1 (11) - (- 6 \ln (x))$ .

$- \frac{- 1 (11 - 6 \ln (x))}{9 x^{4}}$

Step 44.10

Move the negative in front of the fraction.

$- - \frac{11 - 6 \ln (x)}{9 x^{4}}$

Step 44.11

Multiply $- 1$ by $- 1$ .

$1 \frac{11 - 6 \ln (x)}{9 x^{4}}$

Step 44.12

Multiply $\frac{11 - 6 \ln (x)}{9 x^{4}}$ by $1$ .

$\frac{11 - 6 \ln (x)}{9 x^{4}}$

Step 45

Evaluate the derivative at $x = 8$ .

$\frac{11 - 6 \ln (8)}{9 {(8)}^{4}}$

Step 46

Simplify.

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Step 46.1

Simplify the numerator.

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Step 46.1.1

Simplify $- 6 \ln (8)$ by moving $6$ inside the logarithm.

$\frac{11 - \ln (8^{6})}{9 \cdot 8^{4}}$

Step 46.1.2

Raise $8$ to the power of $6$ .

$\frac{11 - \ln (262144)}{9 \cdot 8^{4}}$

Step 46.2

Simplify the expression.

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Step 46.2.1

Raise $8$ to the power of $4$ .

$\frac{11 - \ln (262144)}{9 \cdot 4096}$

Step 46.2.2

Multiply $9$ by $4096$ .

$\frac{11 - \ln (262144)}{36864}$