展开 (u+1)sqrt(u)du

解答

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(u + 1) u d u

u u d u + u d u

求解步骤

(u + 1) u d u

= u (u + 1) d u

使用分配律:

a (b + c) = ab + a c

a = u d u, b = u, c = 1

= u d uu + u d u \cdot 1

= u u d u + 1 \cdot u d u

乘以:

1 \cdot u = u

= u u d u + u d u

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