Calculus Examples

$\int p {(p + 9)}^{5} d p$

Step 1

Let $u = p + 9$ . Then $d u = d p$ . Rewrite using $u$ and $d$ $u$ .

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Step 1.1

Let $u = p + 9$ . Find $\frac{d u}{d p}$ .

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Step 1.1.1

Differentiate $p + 9$ .

$\frac{d}{d p} [p + 9]$

Step 1.1.2

By the Sum Rule, the derivative of $p + 9$ with respect to $p$ is $\frac{d}{d p} [p] + \frac{d}{d p} [9]$ .

$\frac{d}{d p} [p] + \frac{d}{d p} [9]$

Step 1.1.3

Differentiate using the Power Rule which states that $\frac{d}{d p} [p^{n}]$ is $n p^{n - 1}$ where $n = 1$ .

$1 + \frac{d}{d p} [9]$

Step 1.1.4

Since $9$ is constant with respect to $p$ , the derivative of $9$ with respect to $p$ is $0$ .

$1 + 0$

Step 1.1.5

Add $1$ and $0$ .

$1$

Step 1.2

Rewrite the problem using $u$ and $d u$ .

$\int (u - 9) u^{5} d u$

Step 2

Multiply $(u - 9) u^{5}$ .

$\int u \cdot u^{5} - 9 u^{5} d u$

Step 3

Multiply $u$ by $u^{5}$ by adding the exponents.

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Step 3.1

Multiply $u$ by $u^{5}$ .

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Step 3.1.1

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

$\int u^{1} u^{5} - 9 u^{5} d u$

Step 3.1.2

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

$\int u^{1 + 5} - 9 u^{5} d u$

Step 3.2

Add $1$ and $5$ .

$\int u^{6} - 9 u^{5} d u$

Step 4

Split the single integral into multiple integrals.

$\int u^{6} d u + \int - 9 u^{5} d u$

Step 5

By the Power Rule, the integral of $u^{6}$ with respect to $u$ is $\frac{1}{7} u^{7}$ .

$\frac{1}{7} u^{7} + C + \int - 9 u^{5} d u$

Step 6

Since $- 9$ is constant with respect to $u$ , move $- 9$ out of the integral.

$\frac{1}{7} u^{7} + C - 9 \int u^{5} d u$

Step 7

By the Power Rule, the integral of $u^{5}$ with respect to $u$ is $\frac{1}{6} u^{6}$ .

$\frac{1}{7} u^{7} + C - 9 (\frac{1}{6} u^{6} + C)$

Step 8

Simplify.

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Step 8.1

Simplify.

$\frac{1}{7} u^{7} - 9 (\frac{1}{6}) u^{6} + C$

Step 8.2

Simplify.

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Step 8.2.1

Combine $- 9$ and $\frac{1}{6}$ .

$\frac{1}{7} u^{7} + \frac{- 9}{6} u^{6} + C$

Step 8.2.2

Cancel the common factor of $- 9$ and $6$ .

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Step 8.2.2.1

Factor $3$ out of $- 9$ .

$\frac{1}{7} u^{7} + \frac{3 (- 3)}{6} u^{6} + C$

Step 8.2.2.2

Cancel the common factors.

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Step 8.2.2.2.1

Factor $3$ out of $6$ .

$\frac{1}{7} u^{7} + \frac{3 \cdot - 3}{3 \cdot 2} u^{6} + C$

Step 8.2.2.2.2

Cancel the common factor.

$\frac{1}{7} u^{7} + \frac{3 \cdot - 3}{3 \cdot 2} u^{6} + C$

Step 8.2.2.2.3

Rewrite the expression.

$\frac{1}{7} u^{7} + \frac{- 3}{2} u^{6} + C$

Step 8.2.3

Move the negative in front of the fraction.

$\frac{1}{7} u^{7} - \frac{3}{2} u^{6} + C$

Step 9

Replace all occurrences of $u$ with $p + 9$ .

$\frac{1}{7} {(p + 9)}^{7} - \frac{3}{2} {(p + 9)}^{6} + C$