What is the integral from 0 to 3 of 4x^3 ?

The integral from 0 to 3 of 4x^3 is 81

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integral from 0 to 3 of 4x^3

\int_{0}^{3} 4 x^{3} d x

81

Solution steps

\int_{0}^{3} 4 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_{0}^{3} x^{3} d x

Apply the Power Rule

: [\frac{x ^{4}}{4}]_{0}^{3}

= 4 [\frac{x ^{4}}{4}]_{0}^{3}

Compute the boundaries:

\frac{81}{4}

= 4 \cdot \frac{81}{4}

Simplify

= 81

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What is the integral from 0 to 3 of 4x^3 ?
The integral from 0 to 3 of 4x^3 is 81