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人気のある微分積分 >

integral from 0 to 9 of k(9-x)

解

\int_{0}^{9} k (9 - x)

解

(9 - x) \frac{81}{2}

解答ステップ

\int_{0}^{9} k (9 - x) d k

定数を除く:

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

= (9 - x) \cdot \int_{0}^{9} k d k

\int_{0}^{9} k d k = \frac{81}{2}

= (9 - x) \frac{81}{2}

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