Calculus Examples

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

Step 1

Write $\frac{1}{2 \sqrt{x}} - \frac{1}{x^{2}}$ as a function.

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

Step 2

The function $F (x)$ can be found by finding the indefinite integral of the derivative $f (x)$ .

$F (x) = \int f (x) d x$

Step 3

Set up the integral to solve.

$F (x) = \int \frac{1}{2 \sqrt{x}} - \frac{1}{x^{2}} d x$

Step 4

Split the single integral into multiple integrals.

$\int \frac{1}{2 \sqrt{x}} d x + \int - \frac{1}{x^{2}} d x$

Step 5

Since $\frac{1}{2}$ is constant with respect to $x$ , move $\frac{1}{2}$ out of the integral.

$\frac{1}{2} \int \frac{1}{\sqrt{x}} d x + \int - \frac{1}{x^{2}} d x$

Step 6

Apply basic rules of exponents.

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Step 6.1

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

$\frac{1}{2} \int \frac{1}{x^{\frac{1}{2}}} d x + \int - \frac{1}{x^{2}} d x$

Step 6.2

Move $x^{\frac{1}{2}}$ out of the denominator by raising it to the $- 1$ power.

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

Step 6.3

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

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Step 6.3.1

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

$\frac{1}{2} \int x^{\frac{1}{2} \cdot - 1} d x + \int - \frac{1}{x^{2}} d x$

Step 6.3.2

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

$\frac{1}{2} \int x^{\frac{- 1}{2}} d x + \int - \frac{1}{x^{2}} d x$

Step 6.3.3

Move the negative in front of the fraction.

$\frac{1}{2} \int x^{- \frac{1}{2}} d x + \int - \frac{1}{x^{2}} d x$

Step 7

By the Power Rule, the integral of $x^{- \frac{1}{2}}$ with respect to $x$ is $2 x^{\frac{1}{2}}$ .

$\frac{1}{2} (2 x^{\frac{1}{2}} + C) + \int - \frac{1}{x^{2}} d x$

Step 8

Since $- 1$ is constant with respect to $x$ , move $- 1$ out of the integral.

$\frac{1}{2} (2 x^{\frac{1}{2}} + C) - \int \frac{1}{x^{2}} d x$

Step 9

Apply basic rules of exponents.

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Step 9.1

Move $x^{2}$ out of the denominator by raising it to the $- 1$ power.

$\frac{1}{2} (2 x^{\frac{1}{2}} + C) - \int {(x^{2})}^{- 1} d x$

Step 9.2

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

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Step 9.2.1

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

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

Step 9.2.2

Multiply $2$ by $- 1$ .

$\frac{1}{2} (2 x^{\frac{1}{2}} + C) - \int x^{- 2} d x$

Step 10

By the Power Rule, the integral of $x^{- 2}$ with respect to $x$ is $- x^{- 1}$ .

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

Step 11

Simplify.

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Step 11.1

Simplify.

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

Step 11.2

Simplify.

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Step 11.2.1

Multiply $- 1$ by $- 1$ .

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

Step 11.2.2

Multiply $x^{- 1}$ by $1$ .

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

Step 12

The answer is the antiderivative of the function $f (x) = \frac{1}{2 \sqrt{x}} - \frac{1}{x^{2}}$ .

$F (x) =$ $x^{\frac{1}{2}} + x^{- 1} + C$