1 . 以下命题正确的个数是( )
①命题“
,
”的否定是“
,
”.
②命题“若
,则
”的逆否命题为“若
,则
”.
③若
为假命题,则
、
均为假命题.
①命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ad5fe274cfc8da2dacfb65801f344ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b40448ee47ce44dc78be2392cc40de55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ccd7af9298cd5ff19d8866fedb42ec4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79fdc9ed22f63a15d00cb765d678f52f.png)
②命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2ca415ab67c51270589743526fadba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ad2b31cfb9939e45bdb29af8139af06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a66b3eb88e9897091c193986911a9da.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2016-12-03更新
|
816次组卷
|
2卷引用:2014-2015学年四川省绵阳市高二下学期期末质量测试文科数学试卷
2 . 已知命题
,则
是
![](https://img.xkw.com/dksih/QBM/2015/6/17/1572128670588928/1572128675971072/STEM/40a42cc04c5947d4ad0fa7508b263a55.png)
![](https://img.xkw.com/dksih/QBM/2015/6/17/1572128670588928/1572128675971072/STEM/deacf6b9b45c43a2afaec380883b081c.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
13-14高三上·四川绵阳·阶段练习
3 . 下列判断正确的是
A.若命题![]() ![]() ![]() |
B.命题“若![]() ![]() ![]() ![]() |
C.“![]() ![]() |
D.命题“![]() ![]() |
您最近一年使用:0次
4 . 已知命题
,则
是
![](https://img.xkw.com/dksih/QBM/2016/4/12/1572590560657408/1572590566178816/STEM/30f07b31c6cd41fd94f980689e51d93f.png)
![](https://img.xkw.com/dksih/QBM/2016/4/12/1572590560657408/1572590566178816/STEM/937aad19e0df4efabdf2bc9b0f0dfb10.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次