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設f(x)=|x²-4|，求f'(2)=？274Please respect copyright.ＰＥＮＡＮＡhNfC3u8fXU
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我會不會下手重了點www 不太老少咸宜274Please respect copyright.ＰＥＮＡＮＡ30l0zxMWmD
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但這題的答案蠻簡單的274Please respect copyright.ＰＥＮＡＮＡZldOIJJdjT
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