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設f(x)=|x²-4|，求f'(2)=？337Please respect copyright.ＰＥＮＡＮＡQ3jqhW0GI5
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我會不會下手重了點www 不太老少咸宜337Please respect copyright.ＰＥＮＡＮＡHCecp9xUGS
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但這題的答案蠻簡單的337Please respect copyright.ＰＥＮＡＮＡBASEwp7vQ7
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