[微分] 90政大國貿
-1/X^2
f(X)=e
求f'(0)=?
-1/X^2
e - 0
f'=lim ----------------
X->0 X-0
-1/X^2
e *2
=lim ------------------
X->0 1/X^3
=......=0
-1/X^2
我就想說直接f'(X)=e *2*(1/X^3)
將X=0代入
2
------------
X^3
f'(0)=------------------
1/X^2
e
---->>不存在
那導數在X=0不存在????
我哪裡錯了
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