What is the integral of 5x^3(x^4+5)^6 ?

The integral of 5x^3(x^4+5)^6 is 5/28 (x^4+5)^7+C

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integral of 5x^3(x^4+5)^6

\int 5 x^{3} (x^{4} + 5)^{6} d x

\frac{5}{28} (x^{4} + 5)^{7} + C

Solution steps

\int 5 x^{3} (x^{4} + 5)^{6} d x

Take the constant out:

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

= 5 \cdot \int x^{3} (x^{4} + 5)^{6} d x

Apply u-substitution

: \int \frac{u ^{6}}{4} d u

= 5 \cdot \int \frac{u ^{6}}{4} d u

Take the constant out:

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

= 5 \cdot \frac{1}{4} \cdot \int u^{6} d u

Apply the Power Rule

: \frac{u ^{7}}{7}

= 5 \cdot \frac{1}{4} \cdot \frac{u ^{7}}{7}

Substitute back

u = x^{4} + 5

= 5 \cdot \frac{1}{4} \cdot \frac{( x ^{4} + 5 ) ^{7}}{7}

Simplify

5 \cdot \frac{1}{4} \cdot \frac{( x ^{4} + 5 ) ^{7}}{7} : \frac{5}{28} (x^{4} + 5)^{7}

= \frac{5}{28} (x^{4} + 5)^{7}

Add a constant to the solution

= \frac{5}{28} (x^{4} + 5)^{7} + C

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What is the integral of 5x^3(x^4+5)^6 ?
The integral of 5x^3(x^4+5)^6 is 5/28 (x^4+5)^7+C