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人気のある微分積分 >

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

解

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

解

\frac{4}{15}

+1

十進法表記

0.26666 \dots

解答ステップ

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

y^{2} (2 - 2 y^{2}) = 2 y^{2} (1 - y^{2})

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

定数を除く:

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

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

拡張

y^{2} (1 - y^{2}) : y^{2} - y^{4}

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

総和規則を適用する:

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

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

簡素化

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

= \frac{4}{15}

グラフ

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