解题方法
1 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/876b3fcb31c7681bed341996a255730d.png)
,且
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/876b3fcb31c7681bed341996a255730d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/668e131be078bb203f9e8ee9a9c2ef3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b0ba5c937b27a27b5ef5ab9e51a935.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2 . 给出定义:若函数
在
上可导,即
存在,且导函数
在
上也可导,则称
在
上存在二阶导函数,记
若
在
上恒成立,则函数
在
上为凸函数.以下四个函数在
上是凸函数的是
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724340d69477c0ec2418c392b22b1cab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724340d69477c0ec2418c392b22b1cab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4634d0714ad90046e2ec7f2305c4d16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683d7c81a47aeaae60c0dde61164ab7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55e7e797174ed5458a2602cb5fcc0f60.png)
![](https://img.xkw.com/dksih/QBM/2022/11/20/3113610877018112/3113956063387648/STEM/ac1bdb86c89c41a6a161d1a561cdea48.png?resizew=4)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次