What is the integral of (9-4x)^{11} ?

The integral of (9-4x)^{11} is -1/48 (9-4x)^{12}+C

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integral of (9-4x)^{11}

\int (9 - 4 x)^{11} d x

- \frac{1}{48} (9 - 4 x)^{12} + C

Solution steps

\int (9 - 4 x)^{11} d x

Apply u-substitution

: \int - \frac{u ^{11}}{4} d u

= \int - \frac{u ^{11}}{4} d u

Take the constant out:

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

= - \frac{1}{4} \cdot \int u^{11} d u

Apply the Power Rule

: \frac{u ^{12}}{12}

= - \frac{1}{4} \cdot \frac{u ^{12}}{12}

Substitute back

u = 9 - 4 x

= - \frac{1}{4} \cdot \frac{( 9 - 4 x ) ^{12}}{12}

Simplify

- \frac{1}{4} \cdot \frac{( 9 - 4 x ) ^{12}}{12} : - \frac{1}{48} (9 - 4 x)^{12}

= - \frac{1}{48} (9 - 4 x)^{12}

Add a constant to the solution

= - \frac{1}{48} (9 - 4 x)^{12} + C

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What is the integral of (9-4x)^{11} ?
The integral of (9-4x)^{11} is -1/48 (9-4x)^{12}+C