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

The integral of 2/((1+x)^2) is -2/(1+x)+C

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

\int \frac{2}{( 1 + x ) ^{2}} d x

- \frac{2}{1 + x} + C

Solution steps

\int \frac{2}{( 1 + x ) ^{2}} d x

Take the constant out:

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

= 2 \cdot \int \frac{1}{( 1 + x ) ^{2}} d x

Apply u-substitution

= 2 \cdot \int \frac{1}{u ^{2}} d u

Apply the Power Rule

= 2 (- \frac{1}{u})

Substitute back

u = 1 + x

= 2 (- \frac{1}{1 + x})

Simplify

2 (- \frac{1}{1 + x}) : - \frac{2}{1 + x}

= - \frac{2}{1 + x}

Add a constant to the solution

= - \frac{2}{1 + x} + C