What is the integral from 0 to 1 of 2pi(y)(y-y^3) ?

The integral from 0 to 1 of 2pi(y)(y-y^3) is (4pi)/(15)

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integral from 0 to 1 of 2pi(y)(y-y^3)

\int_{0}^{1} 2 π (y) (y - y^{3}) d y

\frac{4 π}{15}

Decimal Notation

0.83775 \dots

Solution steps

\int_{0}^{1} 2 π y (y - y^{3}) d y

Take the constant out:

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

= 2 π \cdot \int_{0}^{1} y (y - y^{3}) d y

Expand

y (y - y^{3}) : y^{2} - y^{4}

= 2 π \cdot \int_{0}^{1} y^{2} - y^{4} d y

Apply the Sum Rule:

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

= 2 π (\int_{0}^{1} y^{2} d y - \int_{0}^{1} y^{4} d y)

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

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

= 2 π (\frac{1}{3} - \frac{1}{5})

Simplify

2 π (\frac{1}{3} - \frac{1}{5}) : \frac{4 π}{15}

= \frac{4 π}{15}

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What is the integral from 0 to 1 of 2pi(y)(y-y^3) ?
The integral from 0 to 1 of 2pi(y)(y-y^3) is (4pi)/(15)