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人気のある微分積分 >

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

解

\int_{0}^{1} π (x^{2} - x^{3})^{2} d x

解

\frac{π}{105}

+1

十進法表記

0.02991 \dots

解答ステップ

\int_{0}^{1} π (x^{2} - x^{3})^{2} d x

定数を除く:

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

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

拡張

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

= π \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

= π (\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}

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

簡素化

π (\frac{1}{5} - \frac{1}{3} + \frac{1}{7}) : \frac{π}{105}

= \frac{π}{105}

グラフ

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