名校
1 . 对任意
,下列不等式恒成立的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2019-10-21更新
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189次组卷
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2卷引用:河北省辛集中学2020届高三上学期模拟考试(一)数学(理)试卷
2 . 已知集合
,
,则![](https://img.xkw.com/dksih/QBM/2016/10/8/1573057611554816/1573057617608704/STEM/25aff6abb1124bebaef7bef46b6bf079.png)
![](https://img.xkw.com/dksih/QBM/2016/10/8/1573057611554816/1573057617608704/STEM/ebd10677e9c54784bb64aed95c50ace7.png)
![](https://img.xkw.com/dksih/QBM/2016/10/8/1573057611554816/1573057617608704/STEM/d311d8f88a294013afcfd054a6c20cc2.png)
![](https://img.xkw.com/dksih/QBM/2016/10/8/1573057611554816/1573057617608704/STEM/25aff6abb1124bebaef7bef46b6bf079.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
3 . 已知集合
,
,则![](https://img.xkw.com/dksih/QBM/2016/10/8/1573057611554816/1573057617584128/STEM/addcab6b7a4c43119f140365ea9c5806.png)
![](https://img.xkw.com/dksih/QBM/2016/10/8/1573057611554816/1573057617584128/STEM/675129b9fbf04f9ba100ea067deba01a.png)
![](https://img.xkw.com/dksih/QBM/2016/10/8/1573057611554816/1573057617584128/STEM/a0bc63f4e1544e06933afc8e7a7d5afb.png)
![](https://img.xkw.com/dksih/QBM/2016/10/8/1573057611554816/1573057617584128/STEM/addcab6b7a4c43119f140365ea9c5806.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次