What is the integral of 1/((5x+2)^4) ?

The integral of 1/((5x+2)^4) is -1/(15(5x+2)^3)+C

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integral of 1/((5x+2)^4)

\int \frac{1}{( 5 x + 2 ) ^{4}} d x

- \frac{1}{15 ( 5 x + 2 ) ^{3}} + C

Solution steps

\int \frac{1}{( 5 x + 2 ) ^{4}} d x

Apply u-substitution

: \int \frac{1}{5 u ^{4}} d u

= \int \frac{1}{5 u ^{4}} d u

Take the constant out:

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

= \frac{1}{5} \cdot \int \frac{1}{u ^{4}} d u

Apply the Power Rule

: - \frac{1}{3 u ^{3}}

= \frac{1}{5} (- \frac{1}{3 u ^{3}})

Substitute back

u = 5 x + 2

= \frac{1}{5} (- \frac{1}{3 ( 5 x + 2 ) ^{3}})

Simplify

\frac{1}{5} (- \frac{1}{3 ( 5 x + 2 ) ^{3}}) : - \frac{1}{15 ( 5 x + 2 ) ^{3}}

= - \frac{1}{15 ( 5 x + 2 ) ^{3}}

Add a constant to the solution

= - \frac{1}{15 ( 5 x + 2 ) ^{3}} + C

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What is the integral of 1/((5x+2)^4) ?
The integral of 1/((5x+2)^4) is -1/(15(5x+2)^3)+C