Calculus Examples

$y = 5 x^{\frac{8}{5}} - 3 x^{\frac{5}{6}} + x^{\frac{1}{3}} + 5$

Step 1

By the Sum Rule, the derivative of $5 x^{\frac{8}{5}} - 3 x^{\frac{5}{6}} + x^{\frac{1}{3}} + 5$ with respect to $x$ is $\frac{d}{d x} [5 x^{\frac{8}{5}}] + \frac{d}{d x} [- 3 x^{\frac{5}{6}}] + \frac{d}{d x} [x^{\frac{1}{3}}] + \frac{d}{d x} [5]$ .

$\frac{d}{d x} [5 x^{\frac{8}{5}}] + \frac{d}{d x} [- 3 x^{\frac{5}{6}}] + \frac{d}{d x} [x^{\frac{1}{3}}] + \frac{d}{d x} [5]$

Step 2

Evaluate $\frac{d}{d x} [5 x^{\frac{8}{5}}]$ .

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Step 2.1

Since $5$ is constant with respect to $x$ , the derivative of $5 x^{\frac{8}{5}}$ with respect to $x$ is $5 \frac{d}{d x} [x^{\frac{8}{5}}]$ .

$5 \frac{d}{d x} [x^{\frac{8}{5}}] + \frac{d}{d x} [- 3 x^{\frac{5}{6}}] + \frac{d}{d x} [x^{\frac{1}{3}}] + \frac{d}{d x} [5]$

Step 2.2

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = \frac{8}{5}$ .

$5 (\frac{8}{5} x^{\frac{8}{5} - 1}) + \frac{d}{d x} [- 3 x^{\frac{5}{6}}] + \frac{d}{d x} [x^{\frac{1}{3}}] + \frac{d}{d x} [5]$

Step 2.3

To write $- 1$ as a fraction with a common denominator, multiply by $\frac{5}{5}$ .

$5 (\frac{8}{5} x^{\frac{8}{5} - 1 \cdot \frac{5}{5}}) + \frac{d}{d x} [- 3 x^{\frac{5}{6}}] + \frac{d}{d x} [x^{\frac{1}{3}}] + \frac{d}{d x} [5]$

Step 2.4

Combine $- 1$ and $\frac{5}{5}$ .

$5 (\frac{8}{5} x^{\frac{8}{5} + \frac{- 1 \cdot 5}{5}}) + \frac{d}{d x} [- 3 x^{\frac{5}{6}}] + \frac{d}{d x} [x^{\frac{1}{3}}] + \frac{d}{d x} [5]$

Step 2.5

Combine the numerators over the common denominator.

$5 (\frac{8}{5} x^{\frac{8 - 1 \cdot 5}{5}}) + \frac{d}{d x} [- 3 x^{\frac{5}{6}}] + \frac{d}{d x} [x^{\frac{1}{3}}] + \frac{d}{d x} [5]$

Step 2.6

Simplify the numerator.

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Step 2.6.1

Multiply $- 1$ by $5$ .

$5 (\frac{8}{5} x^{\frac{8 - 5}{5}}) + \frac{d}{d x} [- 3 x^{\frac{5}{6}}] + \frac{d}{d x} [x^{\frac{1}{3}}] + \frac{d}{d x} [5]$

Step 2.6.2

Subtract $5$ from $8$ .

$5 (\frac{8}{5} x^{\frac{3}{5}}) + \frac{d}{d x} [- 3 x^{\frac{5}{6}}] + \frac{d}{d x} [x^{\frac{1}{3}}] + \frac{d}{d x} [5]$

Step 2.7

Combine $\frac{8}{5}$ and $x^{\frac{3}{5}}$ .

$5 \frac{8 x^{\frac{3}{5}}}{5} + \frac{d}{d x} [- 3 x^{\frac{5}{6}}] + \frac{d}{d x} [x^{\frac{1}{3}}] + \frac{d}{d x} [5]$

Step 2.8

Combine $5$ and $\frac{8 x^{\frac{3}{5}}}{5}$ .

$\frac{5 (8 x^{\frac{3}{5}})}{5} + \frac{d}{d x} [- 3 x^{\frac{5}{6}}] + \frac{d}{d x} [x^{\frac{1}{3}}] + \frac{d}{d x} [5]$

Step 2.9

Multiply $8$ by $5$ .

$\frac{40 x^{\frac{3}{5}}}{5} + \frac{d}{d x} [- 3 x^{\frac{5}{6}}] + \frac{d}{d x} [x^{\frac{1}{3}}] + \frac{d}{d x} [5]$

Step 2.10

Factor $5$ out of $40 x^{\frac{3}{5}}$ .

$\frac{5 (8 x^{\frac{3}{5}})}{5} + \frac{d}{d x} [- 3 x^{\frac{5}{6}}] + \frac{d}{d x} [x^{\frac{1}{3}}] + \frac{d}{d x} [5]$

Step 2.11

Cancel the common factors.

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Step 2.11.1

Factor $5$ out of $5$ .

$\frac{5 (8 x^{\frac{3}{5}})}{5 (1)} + \frac{d}{d x} [- 3 x^{\frac{5}{6}}] + \frac{d}{d x} [x^{\frac{1}{3}}] + \frac{d}{d x} [5]$

Step 2.11.2

Cancel the common factor.

$\frac{5 (8 x^{\frac{3}{5}})}{5 \cdot 1} + \frac{d}{d x} [- 3 x^{\frac{5}{6}}] + \frac{d}{d x} [x^{\frac{1}{3}}] + \frac{d}{d x} [5]$

Step 2.11.3

Rewrite the expression.

$\frac{8 x^{\frac{3}{5}}}{1} + \frac{d}{d x} [- 3 x^{\frac{5}{6}}] + \frac{d}{d x} [x^{\frac{1}{3}}] + \frac{d}{d x} [5]$

Step 2.11.4

Divide $8 x^{\frac{3}{5}}$ by $1$ .

$8 x^{\frac{3}{5}} + \frac{d}{d x} [- 3 x^{\frac{5}{6}}] + \frac{d}{d x} [x^{\frac{1}{3}}] + \frac{d}{d x} [5]$

Step 3

Evaluate $\frac{d}{d x} [- 3 x^{\frac{5}{6}}]$ .

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Step 3.1

Since $- 3$ is constant with respect to $x$ , the derivative of $- 3 x^{\frac{5}{6}}$ with respect to $x$ is $- 3 \frac{d}{d x} [x^{\frac{5}{6}}]$ .

$8 x^{\frac{3}{5}} - 3 \frac{d}{d x} [x^{\frac{5}{6}}] + \frac{d}{d x} [x^{\frac{1}{3}}] + \frac{d}{d x} [5]$

Step 3.2

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = \frac{5}{6}$ .

$8 x^{\frac{3}{5}} - 3 (\frac{5}{6} x^{\frac{5}{6} - 1}) + \frac{d}{d x} [x^{\frac{1}{3}}] + \frac{d}{d x} [5]$

Step 3.3

To write $- 1$ as a fraction with a common denominator, multiply by $\frac{6}{6}$ .

$8 x^{\frac{3}{5}} - 3 (\frac{5}{6} x^{\frac{5}{6} - 1 \cdot \frac{6}{6}}) + \frac{d}{d x} [x^{\frac{1}{3}}] + \frac{d}{d x} [5]$

Step 3.4

Combine $- 1$ and $\frac{6}{6}$ .

$8 x^{\frac{3}{5}} - 3 (\frac{5}{6} x^{\frac{5}{6} + \frac{- 1 \cdot 6}{6}}) + \frac{d}{d x} [x^{\frac{1}{3}}] + \frac{d}{d x} [5]$

Step 3.5

Combine the numerators over the common denominator.

$8 x^{\frac{3}{5}} - 3 (\frac{5}{6} x^{\frac{5 - 1 \cdot 6}{6}}) + \frac{d}{d x} [x^{\frac{1}{3}}] + \frac{d}{d x} [5]$

Step 3.6

Simplify the numerator.

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Step 3.6.1

Multiply $- 1$ by $6$ .

$8 x^{\frac{3}{5}} - 3 (\frac{5}{6} x^{\frac{5 - 6}{6}}) + \frac{d}{d x} [x^{\frac{1}{3}}] + \frac{d}{d x} [5]$

Step 3.6.2

Subtract $6$ from $5$ .

$8 x^{\frac{3}{5}} - 3 (\frac{5}{6} x^{\frac{- 1}{6}}) + \frac{d}{d x} [x^{\frac{1}{3}}] + \frac{d}{d x} [5]$

Step 3.7

Move the negative in front of the fraction.

$8 x^{\frac{3}{5}} - 3 (\frac{5}{6} x^{- \frac{1}{6}}) + \frac{d}{d x} [x^{\frac{1}{3}}] + \frac{d}{d x} [5]$

Step 3.8

Combine $\frac{5}{6}$ and $x^{- \frac{1}{6}}$ .

$8 x^{\frac{3}{5}} - 3 \frac{5 x^{- \frac{1}{6}}}{6} + \frac{d}{d x} [x^{\frac{1}{3}}] + \frac{d}{d x} [5]$

Step 3.9

Combine $- 3$ and $\frac{5 x^{- \frac{1}{6}}}{6}$ .

$8 x^{\frac{3}{5}} + \frac{- 3 (5 x^{- \frac{1}{6}})}{6} + \frac{d}{d x} [x^{\frac{1}{3}}] + \frac{d}{d x} [5]$

Step 3.10

Multiply $5$ by $- 3$ .

$8 x^{\frac{3}{5}} + \frac{- 15 x^{- \frac{1}{6}}}{6} + \frac{d}{d x} [x^{\frac{1}{3}}] + \frac{d}{d x} [5]$

Step 3.11

Move $x^{- \frac{1}{6}}$ to the denominator using the negative exponent rule $b^{- n} = \frac{1}{b^{n}}$ .

$8 x^{\frac{3}{5}} + \frac{- 15}{6 x^{\frac{1}{6}}} + \frac{d}{d x} [x^{\frac{1}{3}}] + \frac{d}{d x} [5]$

Step 3.12

Factor $3$ out of $- 15$ .

$8 x^{\frac{3}{5}} + \frac{3 (- 5)}{6 x^{\frac{1}{6}}} + \frac{d}{d x} [x^{\frac{1}{3}}] + \frac{d}{d x} [5]$

Step 3.13

Cancel the common factors.

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Step 3.13.1

Factor $3$ out of $6 x^{\frac{1}{6}}$ .

$8 x^{\frac{3}{5}} + \frac{3 (- 5)}{3 (2 x^{\frac{1}{6}})} + \frac{d}{d x} [x^{\frac{1}{3}}] + \frac{d}{d x} [5]$

Step 3.13.2

Cancel the common factor.

$8 x^{\frac{3}{5}} + \frac{3 \cdot - 5}{3 (2 x^{\frac{1}{6}})} + \frac{d}{d x} [x^{\frac{1}{3}}] + \frac{d}{d x} [5]$

Step 3.13.3

Rewrite the expression.

$8 x^{\frac{3}{5}} + \frac{- 5}{2 x^{\frac{1}{6}}} + \frac{d}{d x} [x^{\frac{1}{3}}] + \frac{d}{d x} [5]$

Step 3.14

Move the negative in front of the fraction.

$8 x^{\frac{3}{5}} - \frac{5}{2 x^{\frac{1}{6}}} + \frac{d}{d x} [x^{\frac{1}{3}}] + \frac{d}{d x} [5]$

Step 4

Evaluate $\frac{d}{d x} [x^{\frac{1}{3}}]$ .

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Step 4.1

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

$8 x^{\frac{3}{5}} - \frac{5}{2 x^{\frac{1}{6}}} + \frac{1}{3} x^{\frac{1}{3} - 1} + \frac{d}{d x} [5]$

Step 4.2

To write $- 1$ as a fraction with a common denominator, multiply by $\frac{3}{3}$ .

$8 x^{\frac{3}{5}} - \frac{5}{2 x^{\frac{1}{6}}} + \frac{1}{3} x^{\frac{1}{3} - 1 \cdot \frac{3}{3}} + \frac{d}{d x} [5]$

Step 4.3

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

$8 x^{\frac{3}{5}} - \frac{5}{2 x^{\frac{1}{6}}} + \frac{1}{3} x^{\frac{1}{3} + \frac{- 1 \cdot 3}{3}} + \frac{d}{d x} [5]$

Step 4.4

Combine the numerators over the common denominator.

$8 x^{\frac{3}{5}} - \frac{5}{2 x^{\frac{1}{6}}} + \frac{1}{3} x^{\frac{1 - 1 \cdot 3}{3}} + \frac{d}{d x} [5]$

Step 4.5

Simplify the numerator.

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Step 4.5.1

Multiply $- 1$ by $3$ .

$8 x^{\frac{3}{5}} - \frac{5}{2 x^{\frac{1}{6}}} + \frac{1}{3} x^{\frac{1 - 3}{3}} + \frac{d}{d x} [5]$

Step 4.5.2

Subtract $3$ from $1$ .

$8 x^{\frac{3}{5}} - \frac{5}{2 x^{\frac{1}{6}}} + \frac{1}{3} x^{\frac{- 2}{3}} + \frac{d}{d x} [5]$

Step 4.6

Move the negative in front of the fraction.

$8 x^{\frac{3}{5}} - \frac{5}{2 x^{\frac{1}{6}}} + \frac{1}{3} x^{- \frac{2}{3}} + \frac{d}{d x} [5]$

Step 5

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

$8 x^{\frac{3}{5}} - \frac{5}{2 x^{\frac{1}{6}}} + \frac{1}{3} x^{- \frac{2}{3}} + 0$

Step 6

Simplify.

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Step 6.1

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

$8 x^{\frac{3}{5}} - \frac{5}{2 x^{\frac{1}{6}}} + \frac{1}{3} \cdot \frac{1}{x^{\frac{2}{3}}} + 0$

Step 6.2

Combine terms.

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Step 6.2.1

Multiply $\frac{1}{3}$ by $\frac{1}{x^{\frac{2}{3}}}$ .

$8 x^{\frac{3}{5}} - \frac{5}{2 x^{\frac{1}{6}}} + \frac{1}{3 x^{\frac{2}{3}}} + 0$

Step 6.2.2

Add $8 x^{\frac{3}{5}} - \frac{5}{2 x^{\frac{1}{6}}} + \frac{1}{3 x^{\frac{2}{3}}}$ and $0$ .

$8 x^{\frac{3}{5}} - \frac{5}{2 x^{\frac{1}{6}}} + \frac{1}{3 x^{\frac{2}{3}}}$

Step 6.3

Reorder terms.

$8 x^{\frac{3}{5}} + \frac{1}{3 x^{\frac{2}{3}}} - \frac{5}{2 x^{\frac{1}{6}}}$