What is the integral of 1/(2+sqrt(x+1)) ?

The integral of 1/(2+sqrt(x+1)) is 2(2+sqrt(x+1)-2ln|2+sqrt(x+1)|)+C

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integral of 1/(2+sqrt(x+1))

\int \frac{1}{2 + x + 1} d x

2 (2 + x + 1 - 2 ln 2 + x + 1) + C

Solution steps

\int \frac{1}{2 + x + 1} d x

Apply u-substitution

: \int \frac{1}{2 + u} d u

= \int \frac{1}{2 + u} d u

Apply u-substitution

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

= \int \frac{2 ( v - 2 )}{v} d v

Take the constant out:

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

= 2 \cdot \int \frac{v - 2}{v} d v

Expand

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

= 2 \cdot \int 1 - \frac{2}{v} d v

Apply the Sum Rule:

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

= 2 (\int 1 d v - \int \frac{2}{v} d v)

\int 1 d v = v

\int \frac{2}{v} d v = 2 ln ∣ v ∣

= 2 (v - 2 ln ∣ v ∣)

Substitute back

= 2 (2 + x + 1 - 2 ln 2 + x + 1)

Add a constant to the solution

= 2 (2 + x + 1 - 2 ln 2 + x + 1) + C

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What is the integral of 1/(2+sqrt(x+1)) ?
The integral of 1/(2+sqrt(x+1)) is 2(2+sqrt(x+1)-2ln|2+sqrt(x+1)|)+C