Re: [微分] 88台大

[Fubini (===漂移的阿尼===)]

※ 引述《bitchdog (PEaCE)》之銘言：
: 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

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