已知函数
的定义域为
,当
时,
恒成立,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13266d1f4ead8806fc5c4d4b0afe7212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e3c99ca3d73d87d3fdbef88c859dd6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc8283d82c956bd110d237d18adcaee6.png)
A.![]() ![]() |
B.![]() ![]() |
C.![]() |
D.![]() |
更新时间:2022-10-11 14:19:11
|
【知识点】 定义法判断或证明函数的单调性解读
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