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設f(x)=|x²-4|，求f'(2)=？344Please respect copyright.ＰＥＮＡＮＡgCgfZE0UdH
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我會不會下手重了點www 不太老少咸宜344Please respect copyright.ＰＥＮＡＮＡSJhWy7OAEp
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但這題的答案蠻簡單的344Please respect copyright.ＰＥＮＡＮＡK8FhEwVM5S
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