[考古] 成功大學-極限
Let f be differentiable for x>0 . Prove or disprove
(1)If lim x->∞ f(x)=0 , then lim x->∞ f'(x)=0.
(2)If lim x->0+ f(x)=∞, then lim x->0+ f'(x)=-∞.
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