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人気のある微分積分 >

integral from 0 to 1 of x^230x^2(1-x)^2

解

\int_{0}^{1} x^{2} 30 x^{2} (1 - x)^{2} d x

解

\frac{2}{7}

+1

十進法表記

0.28571 \dots

解答ステップ

\int_{0}^{1} x^{2} \cdot 30 x^{2} (1 - x)^{2} d x

定数を除く:

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

= 30 \cdot \int_{0}^{1} x^{2} x^{2} (1 - x)^{2} d x

簡素化

x^{2} x^{2} : x^{4}

= 30 \cdot \int_{0}^{1} x^{4} (1 - x)^{2} d x

拡張

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

= 30 \cdot \int_{0}^{1} x^{4} - 2 x^{5} + x^{6} d x

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

= 30 (\int_{0}^{1} x^{4} d x - \int_{0}^{1} 2 x^{5} d x + \int_{0}^{1} x^{6} d x)

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

\int_{0}^{1} 2 x^{5} d x = \frac{1}{3}

\int_{0}^{1} x^{6} d x = \frac{1}{7}

= 30 (\frac{1}{5} - \frac{1}{3} + \frac{1}{7})

簡素化

30 (\frac{1}{5} - \frac{1}{3} + \frac{1}{7}) : \frac{2}{7}

= \frac{2}{7}

グラフ

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