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:2015-2016学年河北邢台一中高二6月月考理科数学试卷
11-12高二下·福建·期末
名校
2 . 已知不等式
,对满足
的一切实数
都成立,则实数
的取值范围为______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d90e9daac8881c7e882a3c6dae022e8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/338ac09ffd9addc3dadf363152c3e39d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3fb0c9c7e30bbc0ec8c3521577ee4fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2016-12-02更新
|
397次组卷
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5卷引用:2013-2014学年河北唐山一中高二下学期期末考试理科数学试卷
(已下线)2013-2014学年河北唐山一中高二下学期期末考试理科数学试卷(已下线)2011-2012学年福建师大附中高二下学期期末模块测试理科数学试卷(已下线)2014人教B版选修4-5 2.4最大值与最小值 优化数学模型河南省林州市第一中学2016-2017学年高二4月调研考试数学(文)试题吉林省蛟河市第一中学校2018-2019学年高二下学期第三次测试数学(文)试题
3 . 若关于
的不等式
恒成立,则
的取值范围是______ .
![](https://img.xkw.com/dksih/QBM/2016/8/11/1572974831960064/1572974838005760/STEM/4b91e27547c747b198d4312f7bc36ddc.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2016/8/11/1572974831960064/1572974838005760/STEM/5abf8f74416b48b09ba8886ba10550e6.png?resizew=113)
![](https://img.xkw.com/dksih/QBM/2016/8/11/1572974831960064/1572974838005760/STEM/6dfc09c013594b61bc04584d79d7371b.png?resizew=13)
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4 . 不等式
的解集是_________________
![](https://img.xkw.com/dksih/QBM/2016/8/11/1572974955003904/1572974961041408/STEM/132367fe8b964072872d59509fce61c8.png?resizew=159)
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5 . 不等式
的解集为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d60132b980689083124e281b9dddd1fd.png)
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