What is the integral of (x^3)/(\sqrt[5]{x^2+7)} ?

The integral of (x^3)/(\sqrt[5]{x^2+7)} is 1/2 (5/9 (x^2+7)^{9/5}-35/4 (x^2+7)^{4/5})+C

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integral of (x^3)/(\sqrt[5]{x^2+7)}

\frac{1}{2} (\frac{5}{9} (x^{2} + 7)^{\frac{9}{5}} - \frac{35}{4} (x^{2} + 7)^{\frac{4}{5}}) + C

Solution steps

Apply u-substitution

Take the constant out:

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

Expand

Apply the Sum Rule:

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

\int u^{\frac{4}{5}} d u = \frac{5}{9} u^{\frac{9}{5}}

= \frac{1}{2} (\frac{5}{9} u^{\frac{9}{5}} - \frac{35}{4} u^{\frac{4}{5}})

Substitute back

u = x^{2} + 7

= \frac{1}{2} (\frac{5}{9} (x^{2} + 7)^{\frac{9}{5}} - \frac{35}{4} (x^{2} + 7)^{\frac{4}{5}})

Add a constant to the solution

= \frac{1}{2} (\frac{5}{9} (x^{2} + 7)^{\frac{9}{5}} - \frac{35}{4} (x^{2} + 7)^{\frac{4}{5}}) + C

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What is the integral of (x^3)/(\sqrt[5]{x^2+7)} ?
The integral of (x^3)/(\sqrt[5]{x^2+7)} is 1/2 (5/9 (x^2+7)^{9/5}-35/4 (x^2+7)^{4/5})+C