2020高三·浙江·专题练习
1 . 已知函数
,若函数
在开区间
上恒有最小值,则实数
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42ec5ebdde0c32f22557d5fbb7c5195f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0c053877e0ea3bd5b8604dfc6d0f80c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2 . 对任意实数
,都有
,则实数
的取值范围是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a15e0caa59ba78186f5dd679f943a9a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次