What is the integral of 3sqrt(x-1) ?

The integral of 3sqrt(x-1) is 2(x-1)^{3/2}+C

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integral of 3sqrt(x-1)

\int 3 x - 1 d x

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

Solution steps

\int 3 x - 1 d x

Take the constant out:

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

= 3 \cdot \int x - 1 d x

Apply u-substitution

: \int u d u

= 3 \cdot \int u d u

Apply the Power Rule

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

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

Substitute back

u = x - 1

= 3 \cdot \frac{2}{3} (x - 1)^{\frac{3}{2}}

Simplify

3 \cdot \frac{2}{3} (x - 1)^{\frac{3}{2}} : 2 (x - 1)^{\frac{3}{2}}

= 2 (x - 1)^{\frac{3}{2}}

Add a constant to the solution

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

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