展开 pi(ah^2-(h^3)/3)

解答

展开

π (a h^{2} - \frac{h ^{3}}{3})

πa h^{2} - \frac{π h ^{3}}{3}

求解步骤

π (a h^{2} - \frac{h ^{3}}{3})

使用分配律:

a (b - c) = ab - a c

a = π, b = a h^{2}, c = \frac{h ^{3}}{3}

= πa h^{2} - π \frac{h ^{3}}{3}

乘

π \frac{h ^{3}}{3} : \frac{π h ^{3}}{3}

= πa h^{2} - \frac{π h ^{3}}{3}

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