Calculus Examples

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

Step 1

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 2

Set up the integral to solve.

$F (x) = \int \frac{x^{3}}{2} - 3 x^{- 2} - 2 x^{3} - x^{\frac{3}{2}} d x$

Step 3

Simplify.

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Step 3.1

To write $- 2 x^{3}$ as a fraction with a common denominator, multiply by $\frac{2}{2}$ .

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

Step 3.2

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

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

Step 3.3

Combine the numerators over the common denominator.

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

Step 3.4

Multiply $2$ by $- 2$ .

$\int - 3 x^{- 2} + \frac{x^{3} - 4 x^{3}}{2} - x^{\frac{3}{2}} d x$

Step 3.5

Subtract $4 x^{3}$ from $x^{3}$ .

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

Step 3.6

Move the negative in front of the fraction.

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

Step 4

Split the single integral into multiple integrals.

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

Step 5

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

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

Step 6

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

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

Step 7

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

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

Step 8

Since $\frac{3}{2}$ is constant with respect to $x$ , move $\frac{3}{2}$ out of the integral.

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

Step 9

By the Power Rule, the integral of $x^{3}$ with respect to $x$ is $\frac{1}{4} x^{4}$ .

$- 3 (- x^{- 1} + C) - \frac{3}{2} (\frac{1}{4} x^{4} + C) + \int - x^{\frac{3}{2}} d x$

Step 10

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

$- 3 (- x^{- 1} + C) - \frac{3}{2} (\frac{1}{4} x^{4} + C) - \int x^{\frac{3}{2}} d x$

Step 11

By the Power Rule, the integral of $x^{\frac{3}{2}}$ with respect to $x$ is $\frac{2}{5} x^{\frac{5}{2}}$ .

$- 3 (- x^{- 1} + C) - \frac{3}{2} (\frac{1}{4} x^{4} + C) - (\frac{2}{5} x^{\frac{5}{2}} + C)$

Step 12

Simplify.

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Step 12.1

Simplify.

$\frac{3}{x} - \frac{3 x^{4}}{8} - (\frac{2}{5} x^{\frac{5}{2}}) + C$

Step 12.2

Combine $\frac{2}{5}$ and $x^{\frac{5}{2}}$ .

$\frac{3}{x} - \frac{3 x^{4}}{8} - \frac{2 x^{\frac{5}{2}}}{5} + C$

Step 13

Reorder terms.

$\frac{3}{x} - \frac{3}{8} x^{4} - \frac{2}{5} x^{\frac{5}{2}} + C$

Step 14

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

$F (x) =$ $\frac{3}{x} - \frac{3}{8} x^{4} - \frac{2}{5} x^{\frac{5}{2}} + C$