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

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

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

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

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

\frac{1}{2} ln x^{2} + 1 + C

Solution steps

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

Apply u-substitution

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

Take the constant out:

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

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

Use the common integral:

\int \frac{1}{u} d u = ln (∣ u ∣)

= \frac{1}{2} ln ∣ u ∣

Substitute back

u = x^{2} + 1

= \frac{1}{2} ln x^{2} + 1

Add a constant to the solution

= \frac{1}{2} ln x^{2} + 1 + C

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