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設f(x)=|x²-4|，求f'(2)=？285Please respect copyright.ＰＥＮＡＮＡzP0PdARF1d
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我會不會下手重了點www 不太老少咸宜285Please respect copyright.ＰＥＮＡＮＡmcAIJPhOOr
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但這題的答案蠻簡單的285Please respect copyright.ＰＥＮＡＮＡYOHmhXaIR9
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