設f(x)=|x²-4|，求f'(2)=？354Please respect copyright.ＰＥＮＡＮＡA5WOPthtKJ
我會不會下手重了點www 不太老少咸宜354Please respect copyright.ＰＥＮＡＮＡsaPmfMbvD8
但這題的答案蠻簡單的354Please respect copyright.ＰＥＮＡＮＡzZa3CrzhFm
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