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

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

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

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

x - arctan (x) + C

Solution steps

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

Apply the Sum Rule:

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

= \int 1 d x - \int \frac{1}{x ^{2} + 1} d x

\int 1 d x = x

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

= x - arctan (x)

Add a constant to the solution

= x - arctan (x) + C

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What is the integral of 1-1/(x^2+1) ?
The integral of 1-1/(x^2+1) is x-arctan(x)+C