What is the integral of 90sqrt(x+4) ?

The integral of 90sqrt(x+4) is 60(x+4)^{3/2}+C

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integral of 90sqrt(x+4)

\int 90 x + 4 d x

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

Solution steps

\int 90 x + 4 d x

Take the constant out:

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

= 90 \cdot \int x + 4 d x

Apply u-substitution

: \int u d u

= 90 \cdot \int u d u

Apply the Power Rule

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

= 90 \cdot \frac{2}{3} u^{\frac{3}{2}}

Substitute back

u = x + 4

= 90 \cdot \frac{2}{3} (x + 4)^{\frac{3}{2}}

Simplify

90 \cdot \frac{2}{3} (x + 4)^{\frac{3}{2}} : 60 (x + 4)^{\frac{3}{2}}

= 60 (x + 4)^{\frac{3}{2}}

Add a constant to the solution

= 60 (x + 4)^{\frac{3}{2}} + C

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What is the integral of 90sqrt(x+4) ?
The integral of 90sqrt(x+4) is 60(x+4)^{3/2}+C