What is the integral of x^5sqrt(x^6+8) ?

The integral of x^5sqrt(x^6+8) is 1/9 (x^6+8)^{3/2}+C

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integral of x^5sqrt(x^6+8)

\int x^{5} x^{6} + 8 d x

\frac{1}{9} (x^{6} + 8)^{\frac{3}{2}} + C

Solution steps

\int x^{5} x^{6} + 8 d x

Apply u-substitution

= \int \frac{u}{6} d u

Take the constant out:

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

= \frac{1}{6} \cdot \int u d u

Apply the Power Rule

= \frac{1}{6} \cdot \frac{2}{3} u^{\frac{3}{2}}

Substitute back

u = x^{6} + 8

= \frac{1}{6} \cdot \frac{2}{3} (x^{6} + 8)^{\frac{3}{2}}

Simplify

\frac{1}{6} \cdot \frac{2}{3} (x^{6} + 8)^{\frac{3}{2}} : \frac{1}{9} (x^{6} + 8)^{\frac{3}{2}}

= \frac{1}{9} (x^{6} + 8)^{\frac{3}{2}}

Add a constant to the solution

= \frac{1}{9} (x^{6} + 8)^{\frac{3}{2}} + C

What is the integral of x^5sqrt(x^6+8) ?
The integral of x^5sqrt(x^6+8) is 1/9 (x^6+8)^{3/2}+C