What is the integral of 3/(sqrt(x)+2) ?

The integral of 3/(sqrt(x)+2) is 6(sqrt(x)+2-2ln|sqrt(x)+2|)+C

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integral of 3/(sqrt(x)+2)

\int \frac{3}{x + 2} d x

6 (x + 2 - 2 ln x + 2) + C

Solution steps

\int \frac{3}{x + 2} d x

Take the constant out:

\int a \cdot f (x) d x = a \cdot \int f (x) d x

= 3 \cdot \int \frac{1}{x + 2} d x

Apply u-substitution

: \int \frac{2 ( u - 2 )}{u} d u

= 3 \cdot \int \frac{2 ( u - 2 )}{u} d u

Take the constant out:

\int a \cdot f (x) d x = a \cdot \int f (x) d x

= 3 \cdot 2 \cdot \int \frac{u - 2}{u} d u

Expand

\frac{u - 2}{u} : 1 - \frac{2}{u}

= 3 \cdot 2 \cdot \int 1 - \frac{2}{u} d u

Apply the Sum Rule:

\int f (x) \pm g (x) d x = \int f (x) d x \pm \int g (x) d x

= 3 \cdot 2 (\int 1 d u - \int \frac{2}{u} d u)

\int 1 d u = u

\int \frac{2}{u} d u = 2 ln ∣ u ∣

= 3 \cdot 2 (u - 2 ln ∣ u ∣)

Substitute back

u = x + 2

= 3 \cdot 2 (x + 2 - 2 ln x + 2)

Simplify

= 6 (x + 2 - 2 ln x + 2)

Add a constant to the solution

= 6 (x + 2 - 2 ln x + 2) + C

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What is the integral of 3/(sqrt(x)+2) ?
The integral of 3/(sqrt(x)+2) is 6(sqrt(x)+2-2ln|sqrt(x)+2|)+C