如果二階導數存在,二階導數是零不是充分條件:如 f(x)=x^4;也要看一階導數是不是遞增到遞減或遞減到遞增(定義好像不需要導數
所有跟帖:
• 定義好像不需要導數存在 -youdecide- ♂ (0 bytes) () 03/31/2020 postreply 17:16:36
• 定義好像不需要導數存在 -youdecide- ♂ (0 bytes) () 03/31/2020 postreply 17:16:36
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