1 . 设
:
,
:
,若
是
的充分不必充要条件,则实数
的取值范围是_____________ .
![](https://img.xkw.com/dksih/QBM/2016/6/29/1572840202936320/1572840208515072/STEM/054c82c6acdc416bbe48d6d2c9aa7ae4.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2016/6/29/1572840202936320/1572840208515072/STEM/5d88b09a6bd144f296473fd75c065280.png?resizew=68)
![](https://img.xkw.com/dksih/QBM/2016/6/29/1572840202936320/1572840208515072/STEM/d052576aa1fc49e694f5542dfc3e474b.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2016/6/29/1572840202936320/1572840208515072/STEM/119f3795bc914585999420b2069e8243.png?resizew=116)
![](https://img.xkw.com/dksih/QBM/2016/6/29/1572840202936320/1572840208515072/STEM/1f2267317fcd40dc905aade157b59dd5.png?resizew=25)
![](https://img.xkw.com/dksih/QBM/2016/6/29/1572840202936320/1572840208515072/STEM/d052576aa1fc49e694f5542dfc3e474b.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2016/6/29/1572840202936320/1572840208515072/STEM/c19f9ce0cea648d6a41f79b6c4e623b3.png?resizew=13)
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2016-12-04更新
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526次组卷
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3卷引用:2017届西藏拉萨中学高三上学期月考一数学(理)试卷
2 . 不等式
对任意实数
恒成立,则实数
的取值范围为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7efd320ccd4da9025dbf84d896defbba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次