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設f(x)=|x²-4|，求f'(2)=？256Please respect copyright.ＰＥＮＡＮＡZ7mxmGq0qz
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我會不會下手重了點www 不太老少咸宜256Please respect copyright.ＰＥＮＡＮＡMMRBOvrbl8
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但這題的答案蠻簡單的256Please respect copyright.ＰＥＮＡＮＡOzoXJ5dDQv
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