Calculus Examples

$f (x) = 10 x - 5 x^{3} + 3 x^{\frac{2}{3}}$

Step 1

By the Sum Rule, the derivative of $10 x - 5 x^{3} + 3 x^{\frac{2}{3}}$ with respect to $x$ is $\frac{d}{d x} [10 x] + \frac{d}{d x} [- 5 x^{3}] + \frac{d}{d x} [3 x^{\frac{2}{3}}]$ .

$\frac{d}{d x} [10 x] + \frac{d}{d x} [- 5 x^{3}] + \frac{d}{d x} [3 x^{\frac{2}{3}}]$

Step 2

Evaluate $\frac{d}{d x} [10 x]$ .

Tap for more steps...

Step 2.1

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

$10 \frac{d}{d x} [x] + \frac{d}{d x} [- 5 x^{3}] + \frac{d}{d x} [3 x^{\frac{2}{3}}]$

Step 2.2

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

$10 \cdot 1 + \frac{d}{d x} [- 5 x^{3}] + \frac{d}{d x} [3 x^{\frac{2}{3}}]$

Step 2.3

Multiply $10$ by $1$ .

$10 + \frac{d}{d x} [- 5 x^{3}] + \frac{d}{d x} [3 x^{\frac{2}{3}}]$

Step 3

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

Tap for more steps...

Step 3.1

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

$10 - 5 \frac{d}{d x} [x^{3}] + \frac{d}{d x} [3 x^{\frac{2}{3}}]$

Step 3.2

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

$10 - 5 (3 x^{2}) + \frac{d}{d x} [3 x^{\frac{2}{3}}]$

Step 3.3

Multiply $3$ by $- 5$ .

$10 - 15 x^{2} + \frac{d}{d x} [3 x^{\frac{2}{3}}]$

Step 4

Evaluate $\frac{d}{d x} [3 x^{\frac{2}{3}}]$ .

Tap for more steps...

Step 4.1

Since $3$ is constant with respect to $x$ , the derivative of $3 x^{\frac{2}{3}}$ with respect to $x$ is $3 \frac{d}{d x} [x^{\frac{2}{3}}]$ .

$10 - 15 x^{2} + 3 \frac{d}{d x} [x^{\frac{2}{3}}]$

Step 4.2

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = \frac{2}{3}$ .

$10 - 15 x^{2} + 3 (\frac{2}{3} x^{\frac{2}{3} - 1})$

Step 4.3

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

$10 - 15 x^{2} + 3 (\frac{2}{3} x^{\frac{2}{3} - 1 \cdot \frac{3}{3}})$

Step 4.4

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

$10 - 15 x^{2} + 3 (\frac{2}{3} x^{\frac{2}{3} + \frac{- 1 \cdot 3}{3}})$

Step 4.5

Combine the numerators over the common denominator.

$10 - 15 x^{2} + 3 (\frac{2}{3} x^{\frac{2 - 1 \cdot 3}{3}})$

Step 4.6

Simplify the numerator.

Tap for more steps...

Step 4.6.1

Multiply $- 1$ by $3$ .

$10 - 15 x^{2} + 3 (\frac{2}{3} x^{\frac{2 - 3}{3}})$

Step 4.6.2

Subtract $3$ from $2$ .

$10 - 15 x^{2} + 3 (\frac{2}{3} x^{\frac{- 1}{3}})$

Step 4.7

Move the negative in front of the fraction.

$10 - 15 x^{2} + 3 (\frac{2}{3} x^{- \frac{1}{3}})$

Step 4.8

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

$10 - 15 x^{2} + 3 \frac{2 x^{- \frac{1}{3}}}{3}$

Step 4.9

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

$10 - 15 x^{2} + \frac{3 (2 x^{- \frac{1}{3}})}{3}$

Step 4.10

Multiply $2$ by $3$ .

$10 - 15 x^{2} + \frac{6 x^{- \frac{1}{3}}}{3}$

Step 4.11

Move $x^{- \frac{1}{3}}$ to the denominator using the negative exponent rule $b^{- n} = \frac{1}{b^{n}}$ .

$10 - 15 x^{2} + \frac{6}{3 x^{\frac{1}{3}}}$

Step 4.12

Factor $3$ out of $6$ .

$10 - 15 x^{2} + \frac{3 \cdot 2}{3 x^{\frac{1}{3}}}$

Step 4.13

Cancel the common factors.

Tap for more steps...

Step 4.13.1

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

$10 - 15 x^{2} + \frac{3 \cdot 2}{3 (x^{\frac{1}{3}})}$

Step 4.13.2

Cancel the common factor.

$10 - 15 x^{2} + \frac{3 \cdot 2}{3 x^{\frac{1}{3}}}$

Step 4.13.3

Rewrite the expression.

$10 - 15 x^{2} + \frac{2}{x^{\frac{1}{3}}}$

Step 5

Reorder terms.

$- 15 x^{2} + 10 + \frac{2}{x^{\frac{1}{3}}}$