1 . 用实数
(
或1)表示命题
的真假,其中
表示命题
为假,
表示命题
为真.设命题
:
,
(
).
(1)当
时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
______ ;(2)当
时,实数
的取值范围为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd876a2ed79c64bacc3e64b8ee92735e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd876a2ed79c64bacc3e64b8ee92735e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a0076be2c8160ef6a60be1a0ca51617.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a27a05295f527284bc5a1598ac6db4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2 . 关于
的不等式
的解集非空,则实数
的取值范围是_____ .
![](https://img.xkw.com/dksih/QBM/2015/6/29/1572151777124352/1572151782940672/STEM/4b94aa7c6045405eaf1796125b868a60.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2015/6/29/1572151777124352/1572151782940672/STEM/9f8ad9a5f2c94c36b31003c258b40ede.png?resizew=137)
![](https://img.xkw.com/dksih/QBM/2015/6/29/1572151777124352/1572151782940672/STEM/ee110ef9661f4ec0b76e0af1895a4f34.png?resizew=17)
您最近一年使用:0次
2014高三·全国·专题练习
3 . 若不等式
恒成立,则实数
的取值范围是_______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93bf0fc6944a6c406503ece7e84843fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2016-12-02更新
|
1106次组卷
|
5卷引用:2015届湖南省浏阳、醴陵、攸县三校高三联考文科数学试卷
2015届湖南省浏阳、醴陵、攸县三校高三联考文科数学试卷2015届湖南省浏阳一中、攸县一中、醴陵一中高三12月联考文科数学试卷(已下线)2014年高考数学文二轮专题复习与测试选修4-5不等式选讲练习卷(已下线)2014年高考数学文二轮专题复习与测试选修4-5不等式选讲 练习卷(已下线)2013-2014学年江西省白鹭洲中学高二下学期期中考试理科数学试卷
2012·湖南·一模
4 . 已知函数
,若f(x)
恒成立,则a的取值范围是____
![](https://img.xkw.com/dksih/QBM/2012/2/27/1570778392223744/1570778397343744/STEM/130bbf2ebf7e4dd69f4c967af7b3ed22.png?resizew=159)
![](https://img.xkw.com/dksih/QBM/2012/2/27/1570778392223744/1570778397343744/STEM/b2a5a1d5717b49dcad297cc01bde1770.png?resizew=60)
您最近一年使用:0次
2010·湖南长沙·一模
真题
5 . 若不等式
对任意实数
恒成立,则实数
的取值范围是____________ .
![](https://img.xkw.com/dksih/QBM/2014/6/20/1571784957353984/1571784963170304/STEM/57b9f07a970c48f3862f251d5e401aea.png?resizew=183)
![](https://img.xkw.com/dksih/QBM/2014/6/20/1571784957353984/1571784963170304/STEM/9c892150ab6f45958a499d334cad7f7d.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2014/6/20/1571784957353984/1571784963170304/STEM/5897ed24271f4dd089e782e6e7dec817.png?resizew=13)
您最近一年使用:0次