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設f(x)=|x²-4|，求f'(2)=？253Please respect copyright.ＰＥＮＡＮＡXP8j09CyZP
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我會不會下手重了點www 不太老少咸宜253Please respect copyright.ＰＥＮＡＮＡ89CmD96tTF
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但這題的答案蠻簡單的253Please respect copyright.ＰＥＮＡＮＡEGCWQ8aonA
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