What is the integral of 9xsqrt(x) ?

The integral of 9xsqrt(x) is 18/5 x^{5/2}+C

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integral of 9xsqrt(x)

\int 9 x x d x

\frac{18}{5} x^{\frac{5}{2}} + C

Solution steps

\int 9 x x d x

Take the constant out:

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

= 9 \cdot \int x x d x

Simplify

x x : x^{\frac{3}{2}}

= 9 \cdot \int x^{\frac{3}{2}} d x

Apply the Power Rule

: \frac{2}{5} x^{\frac{5}{2}}

= 9 \cdot \frac{2}{5} x^{\frac{5}{2}}

Simplify

9 \cdot \frac{2}{5} x^{\frac{5}{2}} : \frac{18}{5} x^{\frac{5}{2}}

= \frac{18}{5} x^{\frac{5}{2}}

Add a constant to the solution

= \frac{18}{5} x^{\frac{5}{2}} + C

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