Calculus Examples

$\frac{2 x + 3}{\sqrt{x}}$

Step 1

Write $\frac{2 x + 3}{\sqrt{x}}$ as a function.

$f (x) = \frac{2 x + 3}{\sqrt{x}}$

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.

$F (x) = \int \frac{2 x + 3}{\sqrt{x}} d x$

Step 4

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

$\int \frac{2 x + 3}{x^{\frac{1}{2}}} d x$

Step 5

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

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

Step 6

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

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Step 6.1

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

$\int (2 x + 3) x^{\frac{1}{2} \cdot - 1} d x$

Step 6.2

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

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

Step 6.3

Move the negative in front of the fraction.

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

Step 7

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

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Step 7.1

Apply the distributive property.

$\int 2 x \cdot x^{- \frac{1}{2}} + 3 x^{- \frac{1}{2}} d x$

Step 7.2

Raise $x$ to the power of $1$ .

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

Step 7.3

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

$\int 2 x^{1 - \frac{1}{2}} + 3 x^{- \frac{1}{2}} d x$

Step 7.4

Write $1$ as a fraction with a common denominator.

$\int 2 x^{\frac{2}{2} - \frac{1}{2}} + 3 x^{- \frac{1}{2}} d x$

Step 7.5

Combine the numerators over the common denominator.

$\int 2 x^{\frac{2 - 1}{2}} + 3 x^{- \frac{1}{2}} d x$

Step 7.6

Subtract $1$ from $2$ .

$\int 2 x^{\frac{1}{2}} + 3 x^{- \frac{1}{2}} d x$

Step 7.7

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

$\int 3 x^{- \frac{1}{2}} + 2 x^{\frac{1}{2}} d x$

Step 8

Split the single integral into multiple integrals.

$\int 3 x^{- \frac{1}{2}} d x + \int 2 x^{\frac{1}{2}} d x$

Step 9

Since $3$ is constant with respect to $x$ , move $3$ out of the integral.

$3 \int x^{- \frac{1}{2}} d x + \int 2 x^{\frac{1}{2}} d x$

Step 10

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

$3 (2 x^{\frac{1}{2}} + C) + \int 2 x^{\frac{1}{2}} d x$

Step 11

Since $2$ is constant with respect to $x$ , move $2$ out of the integral.

$3 (2 x^{\frac{1}{2}} + C) + 2 \int x^{\frac{1}{2}} d x$

Step 12

By the Power Rule, the integral of $x^{\frac{1}{2}}$ with respect to $x$ is $\frac{2}{3} x^{\frac{3}{2}}$ .

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

Step 13

Simplify.

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Step 13.1

Simplify.

$6 x^{\frac{1}{2}} + 2 (\frac{2}{3} x^{\frac{3}{2}}) + C$

Step 13.2

Simplify.

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Step 13.2.1

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

$6 x^{\frac{1}{2}} + 2 \frac{2 x^{\frac{3}{2}}}{3} + C$

Step 13.2.2

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

$6 x^{\frac{1}{2}} + \frac{2 (2 x^{\frac{3}{2}})}{3} + C$

Step 13.2.3

Multiply $2$ by $2$ .

$6 x^{\frac{1}{2}} + \frac{4 x^{\frac{3}{2}}}{3} + C$

Step 13.3

Reorder terms.

$6 x^{\frac{1}{2}} + \frac{4}{3} x^{\frac{3}{2}} + C$

Step 14

The answer is the antiderivative of the function $f (x) = \frac{2 x + 3}{\sqrt{x}}$ .

$F (x) =$ $6 x^{\frac{1}{2}} + \frac{4}{3} x^{\frac{3}{2}} + C$