Calculus Examples

$f (x) = x^{8} + 3 x^{7} - 5 x + 2$

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.

$F (x) = \int x^{8} + 3 x^{7} - 5 x + 2 d x$

Step 3

Split the single integral into multiple integrals.

$\int x^{8} d x + \int 3 x^{7} d x + \int - 5 x d x + \int 2 d x$

Step 4

By the Power Rule, the integral of $x^{8}$ with respect to $x$ is $\frac{1}{9} x^{9}$ .

$\frac{1}{9} x^{9} + C + \int 3 x^{7} d x + \int - 5 x d x + \int 2 d x$

Step 5

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

$\frac{1}{9} x^{9} + C + 3 \int x^{7} d x + \int - 5 x d x + \int 2 d x$

Step 6

By the Power Rule, the integral of $x^{7}$ with respect to $x$ is $\frac{1}{8} x^{8}$ .

$\frac{1}{9} x^{9} + C + 3 (\frac{1}{8} x^{8} + C) + \int - 5 x d x + \int 2 d x$

Step 7

Since $- 5$ is constant with respect to $x$ , move $- 5$ out of the integral.

$\frac{1}{9} x^{9} + C + 3 (\frac{1}{8} x^{8} + C) - 5 \int x d x + \int 2 d x$

Step 8

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

$\frac{1}{9} x^{9} + C + 3 (\frac{1}{8} x^{8} + C) - 5 (\frac{1}{2} x^{2} + C) + \int 2 d x$

Step 9

Apply the constant rule.

$\frac{1}{9} x^{9} + C + 3 (\frac{1}{8} x^{8} + C) - 5 (\frac{1}{2} x^{2} + C) + 2 x + C$

Step 10

Simplify.

Tap for more steps...

Step 10.1

Simplify.

Tap for more steps...

Step 10.1.1

Combine $\frac{1}{8}$ and $x^{8}$ .

$\frac{1}{9} x^{9} + C + 3 (\frac{x^{8}}{8} + C) - 5 (\frac{1}{2} x^{2} + C) + 2 x + C$

Step 10.1.2

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

$\frac{1}{9} x^{9} + C + 3 (\frac{x^{8}}{8} + C) - 5 (\frac{x^{2}}{2} + C) + 2 x + C$

Step 10.2

Simplify.

$\frac{x^{9}}{9} + \frac{3 x^{8}}{8} - \frac{5 x^{2}}{2} + 2 x + C$

Step 11

Reorder terms.

$\frac{1}{9} x^{9} + \frac{3}{8} x^{8} - \frac{5}{2} x^{2} + 2 x + C$

Step 12

The answer is the antiderivative of the function $f (x) = x^{8} + 3 x^{7} - 5 x + 2$ .

$F (x) =$ $\frac{1}{9} x^{9} + \frac{3}{8} x^{8} - \frac{5}{2} x^{2} + 2 x + C$