What is the integral from 1 to 3 of (4x)/((x^2+1)^2) ?

The integral from 1 to 3 of (4x)/((x^2+1)^2) is 4/5

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integral from 1 to 3 of (4x)/((x^2+1)^2)

\int_{1}^{3} \frac{4 x}{( x ^{2} + 1 ) ^{2}} d x

\frac{4}{5}

Decimal Notation

0.8

Solution steps

\int_{1}^{3} \frac{4 x}{( x ^{2} + 1 ) ^{2}} d x

Take the constant out:

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

= 4 \cdot \int_{1}^{3} \frac{x}{( x ^{2} + 1 ) ^{2}} d x

Apply u-substitution

: \int_{2}^{10} \frac{1}{2 u ^{2}} d u

= 4 \cdot \int_{2}^{10} \frac{1}{2 u ^{2}} d u

Take the constant out:

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

= 4 \cdot \frac{1}{2} \cdot \int_{2}^{10} \frac{1}{u ^{2}} d u

Apply the Power Rule

: [- \frac{1}{u}]_{2}^{10}

= 4 \cdot \frac{1}{2} [- \frac{1}{u}]_{2}^{10}

Simplify

4 \cdot \frac{1}{2} [- \frac{1}{u}]_{2}^{10} : 2 [- \frac{1}{u}]_{2}^{10}

= 2 [- \frac{1}{u}]_{2}^{10}

Compute the boundaries:

\frac{2}{5}

= 2 \cdot \frac{2}{5}

Simplify

= \frac{4}{5}

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What is the integral from 1 to 3 of (4x)/((x^2+1)^2) ?
The integral from 1 to 3 of (4x)/((x^2+1)^2) is 4/5