What is the integral of 4/((9-2x)^3) ?

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

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integral of 4/((9-2x)^3)

\int \frac{4}{( 9 - 2 x ) ^{3}} d x

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

Solution steps

\int \frac{4}{( 9 - 2 x ) ^{3}} d x

Take the constant out:

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

= 4 \cdot \int \frac{1}{( 9 - 2 x ) ^{3}} d x

Apply u-substitution

: \int - \frac{1}{2 u ^{3}} d u

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

Take the constant out:

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

= 4 (- \frac{1}{2} \cdot \int \frac{1}{u ^{3}} d u)

Apply the Power Rule

: - \frac{1}{2 u ^{2}}

= 4 (- \frac{1}{2} (- \frac{1}{2 u ^{2}}))

Substitute back

u = 9 - 2 x

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

Simplify

4 (- \frac{1}{2} (- \frac{1}{2 ( 9 - 2 x ) ^{2}})) : \frac{1}{( 9 - 2 x ) ^{2}}

= \frac{1}{( 9 - 2 x ) ^{2}}

Add a constant to the solution

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

f (x) = (2 x - 1)^{2}

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