Calculus Examples

$\int 6^{2 x} \cdot 2 d x$

Step 1

Move $2$ to the left of $6^{2 x}$ .

$\int 2 \cdot 6^{2 x} d x$

Step 2

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

$2 \int 6^{2 x} d x$

Step 3

Let $u = 2 x$ . Then $d u = 2 d x$ , so $\frac{1}{2} d u = d x$ . Rewrite using $u$ and $d$ $u$ .

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Step 3.1

Let $u = 2 x$ . Find $\frac{d u}{d x}$ .

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Step 3.1.1

Differentiate $2 x$ .

$\frac{d}{d x} [2 x]$

Step 3.1.2

Since $2$ is constant with respect to $x$ , the derivative of $2 x$ with respect to $x$ is $2 \frac{d}{d x} [x]$ .

$2 \frac{d}{d x} [x]$

Step 3.1.3

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

$2 \cdot 1$

Step 3.1.4

Multiply $2$ by $1$ .

$2$

Step 3.2

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

$2 \int 6^{u} \cdot \frac{1}{2} d u$

Step 4

Combine $6^{u}$ and $\frac{1}{2}$ .

$2 \int \frac{6^{u}}{2} d u$

Step 5

Since $\frac{1}{2}$ is constant with respect to $u$ , move $\frac{1}{2}$ out of the integral.

$2 (\frac{1}{2} \int 6^{u} d u)$

Step 6

Simplify.

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Step 6.1

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

$\frac{2}{2} \int 6^{u} d u$

Step 6.2

Cancel the common factor of $2$ .

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Step 6.2.1

Cancel the common factor.

$\frac{2}{2} \int 6^{u} d u$

Step 6.2.2

Rewrite the expression.

$1 \int 6^{u} d u$

Step 6.3

Multiply $\int 6^{u} d u$ by $1$ .

$\int 6^{u} d u$

Step 7

The integral of $6^{u}$ with respect to $u$ is $\frac{6^{u}}{\ln (6)}$ .

$\frac{6^{u}}{\ln (6)} + C$

Step 8

Rewrite $\frac{6^{u}}{\ln (6)} + C$ as $\frac{1}{\ln (6)} \cdot 6^{u} + C$ .

$\frac{1}{\ln (6)} \cdot 6^{u} + C$

Step 9

Replace all occurrences of $u$ with $2 x$ .

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