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設f(x)=|x²-4|，求f'(2)=？249Please respect copyright.ＰＥＮＡＮＡegthkW70YG
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我會不會下手重了點www 不太老少咸宜249Please respect copyright.ＰＥＮＡＮＡJNTn1rHnMZ
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但這題的答案蠻簡單的249Please respect copyright.ＰＥＮＡＮＡrUflxQ4jYS
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