設f(x)=|x²-4|，求f'(2)=？381Please respect copyright.ＰＥＮＡＮＡUCQhoynDkW
我會不會下手重了點www 不太老少咸宜381Please respect copyright.ＰＥＮＡＮＡsbXFUQQRJY
但這題的答案蠻簡單的381Please respect copyright.ＰＥＮＡＮＡbu8o7KxvUk
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