What is the integral of xsqrt(3x^2+4) ?

The integral of xsqrt(3x^2+4) is 1/9 (3x^2+4)^{3/2}+C

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integral of xsqrt(3x^2+4)

\int x 3 x^{2} + 4 d x

\frac{1}{9} (3 x^{2} + 4)^{\frac{3}{2}} + C

Solution steps

\int x 3 x^{2} + 4 d x

Apply u-substitution

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

= \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{2}{3} u^{\frac{3}{2}}

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

Substitute back

u = 3 x^{2} + 4

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

Simplify

\frac{1}{6} \cdot \frac{2}{3} (3 x^{2} + 4)^{\frac{3}{2}} : \frac{1}{9} (3 x^{2} + 4)^{\frac{3}{2}}

= \frac{1}{9} (3 x^{2} + 4)^{\frac{3}{2}}

Add a constant to the solution

= \frac{1}{9} (3 x^{2} + 4)^{\frac{3}{2}} + C

\int \frac{5 x}{x ^{2} + 1} d x

n = 1 \sum \infty \frac{1}{n 3 ^{n}}

{\frac{1}{s ^{3}}}

\int sin^{3} (15 x) d x

\frac{1}{( s ^{2} + 1 )}

What is the integral of xsqrt(3x^2+4) ?
The integral of xsqrt(3x^2+4) is 1/9 (3x^2+4)^{3/2}+C