11-12高三上·甘肃兰州·阶段练习
1 . 已知函数
,若
,且
,都有不等式
成立,则实数
的取值范围是 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0944ecf142d87f2ee5dc86e569f73f1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fca18a32677dfe9ed27365a9f658e66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f69ac73aebb4bb09959fc55b7dc162b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
12-13高一上·上海松江·期末
2 . 若
,则下列不等式成立的是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46d0d340d2afd09c656871765f8f6088.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次