Calculus Examples

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

Step 1

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

$- 2 \frac{d}{d x} [\frac{1}{x^{\frac{1}{2}}}]$

Step 2

Apply basic rules of exponents.

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Step 2.1

Rewrite $\frac{1}{x^{\frac{1}{2}}}$ as ${(x^{\frac{1}{2}})}^{- 1}$ .

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

Step 2.2

Multiply the exponents in ${(x^{\frac{1}{2}})}^{- 1}$ .

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Step 2.2.1

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

$- 2 \frac{d}{d x} [x^{\frac{1}{2} \cdot - 1}]$

Step 2.2.2

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

$- 2 \frac{d}{d x} [x^{\frac{- 1}{2}}]$

Step 2.2.3

Move the negative in front of the fraction.

$- 2 \frac{d}{d x} [x^{- \frac{1}{2}}]$

Step 3

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

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

Step 4

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

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

Step 5

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

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

Step 6

Combine the numerators over the common denominator.

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

Step 7

Simplify the numerator.

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Step 7.1

Multiply $- 1$ by $2$ .

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

Step 7.2

Subtract $2$ from $- 1$ .

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

Step 8

Move the negative in front of the fraction.

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

Step 9

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

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

Step 10

Multiply $- 1$ by $- 2$ .

$2 \frac{x^{- \frac{3}{2}}}{2}$

Step 11

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

$\frac{2 x^{- \frac{3}{2}}}{2}$

Step 12

Move $x^{- \frac{3}{2}}$ to the denominator using the negative exponent rule $b^{- n} = \frac{1}{b^{n}}$ .

$\frac{2}{2 x^{\frac{3}{2}}}$

Step 13

Cancel the common factor.

$\frac{2}{2 x^{\frac{3}{2}}}$

Step 14

Rewrite the expression.

$\frac{1}{x^{\frac{3}{2}}}$