解题方法
1 . 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,则称
在
上为凸函数.以下四个函数在
上是凸函数的有( )
①
,②
,③
,④
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4b04824a308519a61318a82aa97a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4b04824a308519a61318a82aa97a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f3a38197eac99876d4c7c466bb56926.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa4b560c48799ad63736f4fbca9b0ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/950c7ee07ffb6049b52cc9c4f7ee80bb.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/587882ac081850caa4447c44a7dbb845.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e85b79bba3eb0e914cd26b6df9ab4cde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e6ba3e37b0a197aa7d1b3783408fbef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e0a544fbff7546a458e7f85367af2e4.png)
A.4个 | B.3个 | C.2个 | D.1个 |
您最近一年使用:0次
名校
2 . 已知函数
在
处的导数为2,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28b23ecddfea0d176f3497f41e791cad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11abb76da45ffa52b47c3a6b9a03ac7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28b23ecddfea0d176f3497f41e791cad.png)
A.2 | B.![]() | C.1 | D.![]() |
您最近一年使用:0次
2020-03-25更新
|
856次组卷
|
3卷引用:陕西省渭南市临渭区2019-2020学年高二上学期期末数学(文)试题