展开 (6-x)(sqrt(x))dx

解答

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(6 - x) (x) d x

6 x d x - x x d x

求解步骤

(6 - x) (x) d x

= (x) (6 - x) d x

使用分配律:

a (b - c) = ab - a c

a = (x) d x, b = 6, c = x

= (x) d x \cdot 6 - (x) d xx

= 6 (x) d x - x (x) d x

去除括号:

(a) = a

= 6 x d x - x x d x

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