阿，看錯了，以為是 inverse function，那應該是 k'(2)=-f'(2)/16 , k'(2)= -1/4

来源: yangyangw 于 2018-11-04 10:45:41 [旧帖] [给我悄悄话] 本文已被阅读：次

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阿，看錯了， 以為是 inverse function，那應該是 k'(2)=-f'(2)/16 , k'(2)= -1/4