题目内容

设f(x)=x(x-1)(x-2)…(x-100),则f′(0)等于(    )

A.100                                                B.0

C.100×99×98×…×3×2×1             D.1

思路分析:∵f(x)=x(x-1)(x-2)…(x-100),∴f′(x)=(x-1)(x-2)…(x-100)+x·[(x-1)(x-2)…(x-100)]′.∴f′(0)=(-1)(-2)…(-100)=100×99×98×…×3×2×1.

答案:C

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