作者Fubini (===漂移的阿尼===)
看板trans_math
标题Re: [微分] 88台大
时间Mon Nov 5 11:19:35 2007
※ 引述《bitchdog (PEaCE)》之铭言:
: Let f(x)= (x-1)(x-2)(x-3)(x-5) , then f'(1)=?
: ---------------------
: x - 4
lim f(x)-f(1)
f'(1) = -----------
x->1 x-1
lim (x-2)(x-3)(x-5)
= -----------------
x->1 (x-4)
(-1)*(-2)*(-4) 8
= --------------- = ---
(-3) 3
--
※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 140.112.128.88