作者Fubini (===漂移的阿尼===)
看板trans_math
标题Re: [微分] 94成大企管
时间Mon Nov 5 11:27:53 2007
※ 引述《bitchdog (PEaCE)》之铭言:
: Let f(x) = x(x+1)(x+2)...(x+n)
: -------------------- , find f'(0)
: cosx
lim f(x)-f(0) lim (x+1)(x+2)...(x+n)
f'(0)= ----------- = ------------------- = n!
x->0 x x->0 cosx
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