Calculus Examples

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

Step 1

Split the single integral into multiple integrals.

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

Step 2

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

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

Step 3

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

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

Step 4

Since $- 7$ is constant with respect to $x$ , move $- 7$ out of the integral.

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

Step 5

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

$3 (\frac{1}{9} x^{9} + C) - 7 (\frac{1}{4} x^{4} + C) + \int 7 d x$

Step 6

Apply the constant rule.

$3 (\frac{1}{9} x^{9} + C) - 7 (\frac{1}{4} x^{4} + C) + 7 x + C$

Step 7

Simplify.

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Step 7.1

Simplify.

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Step 7.1.1

Combine $\frac{1}{9}$ and $x^{9}$ .

$3 (\frac{x^{9}}{9} + C) - 7 (\frac{1}{4} x^{4} + C) + 7 x + C$

Step 7.1.2

Combine $\frac{1}{4}$ and $x^{4}$ .

$3 (\frac{x^{9}}{9} + C) - 7 (\frac{x^{4}}{4} + C) + 7 x + C$

Step 7.2

Simplify.

$\frac{x^{9}}{3} - \frac{7 x^{4}}{4} + 7 x + C$

Step 8

Reorder terms.

$\frac{1}{3} x^{9} - \frac{7}{4} x^{4} + 7 x + C$