max min concave convex關系:－情侶台北一日遊2016拜託大大幫忙規劃台北一日遊行程台北一日遊行程規劃台北捷運一日遊推薦台北一日遊可以怎麼安排

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max min concave convex關系

Sep 5th 2013, 00:52

想請問 max min concave convex關系，我好像搞混了

max條件是二階微分小於零，min大於零
concave條件也是二階微分小於零，convex 二階微分大於零
那這樣在某一函數中，我有max 豈不等於我也有concave???

有一例題是 e的-(X-3)平方，F.O.C後求出x=3，S.O.C後f''(3)<0是 MAX，然而這個函數卻neither concave or convex 是為什麼呢?

不知道看不看得懂我打得....總之謝謝囉

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