# How do you find the indefinite integral of int 1/(x+1)?

Aug 4, 2017

The answer is $= \ln | 1 + x | + C$

#### Explanation:

We need

$\int \frac{\mathrm{dx}}{x} = \ln | x | + C$

Therefore,

$\int \frac{\mathrm{dx}}{1 + x} = \ln | 1 + x | + C$