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Popular Calculus >

integral from 0 to 1 of x(1-x)^4

Solution

\int_{0}^{1} x (1 - x)^{4} d x

Solution

\frac{1}{30}

+1

Decimal

0.03333 \dots

Solution steps

\int_{0}^{1} x (1 - x)^{4} d x

Expand

x (1 - x)^{4} : x - 4 x^{2} + 6 x^{3} - 4 x^{4} + x^{5}

= \int_{0}^{1} x - 4 x^{2} + 6 x^{3} - 4 x^{4} + x^{5} d x

Apply the Sum Rule:

\int f (x) \pm g (x) d x = \int f (x) d x \pm \int g (x) d x

= \int_{0}^{1} x d x - \int_{0}^{1} 4 x^{2} d x + \int_{0}^{1} 6 x^{3} d x - \int_{0}^{1} 4 x^{4} d x + \int_{0}^{1} x^{5} d x

\int_{0}^{1} x d x = \frac{1}{2}

\int_{0}^{1} 4 x^{2} d x = \frac{4}{3}

\int_{0}^{1} 6 x^{3} d x = \frac{3}{2}

\int_{0}^{1} 4 x^{4} d x = \frac{4}{5}

\int_{0}^{1} x^{5} d x = \frac{1}{6}

= \frac{1}{2} - \frac{4}{3} + \frac{3}{2} - \frac{4}{5} + \frac{1}{6}

Simplify

\frac{1}{2} - \frac{4}{3} + \frac{3}{2} - \frac{4}{5} + \frac{1}{6} : \frac{1}{30}

= \frac{1}{30}

Graph

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Frequently Asked Questions (FAQ)

What is the integral from 0 to 1 of x(1-x)^4 ?
The integral from 0 to 1 of x(1-x)^4 is 1/30