What is the integral of (4x^3+3)(2x^4+6x)^{1/3} ?

The integral of (4x^3+3)(2x^4+6x)^{1/3} is 3/8 (2x^4+6x)^{4/3}+C

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integral of (4x^3+3)(2x^4+6x)^{1/3}

\int (4 x^{3} + 3) (2 x^{4} + 6 x)^{\frac{1}{3}} d x

\frac{3}{8} (2 x^{4} + 6 x)^{\frac{4}{3}} + C

Solution steps

\int (4 x^{3} + 3) (2 x^{4} + 6 x)^{\frac{1}{3}} d x

Apply u-substitution

= \int \frac{u ^{\frac{1}{3}}}{2} 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 u^{\frac{1}{3}} d u

Apply the Power Rule

= \frac{1}{2} \cdot \frac{3}{4} u^{\frac{4}{3}}

Substitute back

u = 2 x^{4} + 6 x

= \frac{1}{2} \cdot \frac{3}{4} (2 x^{4} + 6 x)^{\frac{4}{3}}

Simplify

\frac{1}{2} \cdot \frac{3}{4} (2 x^{4} + 6 x)^{\frac{4}{3}} : \frac{3}{8} (2 x^{4} + 6 x)^{\frac{4}{3}}

= \frac{3}{8} (2 x^{4} + 6 x)^{\frac{4}{3}}

Add a constant to the solution

= \frac{3}{8} (2 x^{4} + 6 x)^{\frac{4}{3}} + C

What is the integral of (4x^3+3)(2x^4+6x)^{1/3} ?
The integral of (4x^3+3)(2x^4+6x)^{1/3} is 3/8 (2x^4+6x)^{4/3}+C