1 . 已知命题
,使
,命题
,则下列判断正确的是
![](https://img.xkw.com/dksih/QBM/2016/4/20/1572598701563904/1572598707478528/STEM/0a5c1761ce944de88b5ed08d69e7289c.png)
![](https://img.xkw.com/dksih/QBM/2016/4/20/1572598701563904/1572598707478528/STEM/d5992bbd4c2b44e2a8708bc98b1b928e.png)
![](https://img.xkw.com/dksih/QBM/2016/4/20/1572598701563904/1572598707478528/STEM/8d0bdc248e0748daa03ee351a18001cc.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 命题p:若不等式
恒成立,则
,命题q:在△ABC中,
是
的充要条件,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed601878632b19ed4c3cc7c6119c2ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49fe8282fb8035a439eede627d50af5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1795ca84a2543acf19b4ed2d1da5de32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7da9dec952c2e8f1e715f5fff296e88.png)
A.p真q假 | B.“![]() |
C.“p∨q”为假 | D.“![]() ![]() |
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10-11高三·宁夏银川·阶段练习
3 . 已知命题
,命题![](https://img.xkw.com/dksih/QBM/2011/9/5/1570301822189568/1570301827448832/STEM/a86e050e43454e4e870c0c1e5b48fb7a.png)
,
若命题
是真命题,求实数a的取值范围.
![](https://img.xkw.com/dksih/QBM/2011/9/5/1570301822189568/1570301827448832/STEM/a12e49eaf39e464fb2c0c4c17c8509cc.png)
![](https://img.xkw.com/dksih/QBM/2011/9/5/1570301822189568/1570301827448832/STEM/a86e050e43454e4e870c0c1e5b48fb7a.png)
![](https://img.xkw.com/dksih/QBM/2011/9/5/1570301822189568/1570301827448832/STEM/7807a2cd3ce8443b80626552d9fd1bd6.png)
若命题
![](https://img.xkw.com/dksih/QBM/2011/9/5/1570301822189568/1570301827448832/STEM/6ddc27e56a4b403a84737531b7f28ceb.png)
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2014-2015学年山东省枣庄市九中高二上学期期末考试理科数学试卷(已下线)2012届宁夏银川一中高三第一次月考文科数学试卷2014-2015学年福建省泉州一中高一上学期期中考试理科数学试卷2014-2015学年湖北武汉部分重点中学高二下期末考试理科数学试卷