1 . 下列各命题中正确的是
①若命题“
或
”为真命题,则命题“
”和命题“
”均为真命题;
②命题“
,
”的否定是“
,
”;
③“
”是“
”的充分不必要条件;
④命题“若
,则
且
”的否命题是“若
,则
且
”.
①若命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
②命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3fe7728afebda375b4b2a001ea01965.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49d3a6268e9eded3dba57ab5d93cf556.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ff39e9af126fd7f909437e2a0f35324.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51397d3252620200d1bfcccf05711082.png)
③“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3898b62d3fbcb61afb6bc1e9b910f564.png)
④命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d669b5f76a31c225c687c61fdb5adf98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd876a2ed79c64bacc3e64b8ee92735e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfd09fb9482124fd35f19b86894648f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43db2c39601a998aeba8f76419fb30c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0baedc4d7e690ab3f7d80d30ba0a9efe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59b2400d72b1e3145cb21ba719d8a968.png)
A.②③ | B.①②③ | C.①②④ | D.③④ |
您最近一年使用:0次
2016-12-04更新
|
455次组卷
|
2卷引用:2016届辽宁省鞍山市一中高三第四次模拟文科数学试卷
名校
2 . 给出下列四个命题,其中假命题是
A.“![]() ![]() |
B.“若![]() ![]() ![]() ![]() |
C.![]() |
D.![]() ![]() |
您最近一年使用:0次
2017-10-16更新
|
616次组卷
|
3卷引用:辽宁省庄河市高级中学、沈阳市第二十中学2018届高三上学期第一次联考数学(文)试题
名校
3 . 下列命题中,正确的是
①
,
;②“
”是“
”成立的充分条件;③空间中若直线
不平行于平面
,则
内所有直线均与
是异面直线;④空间中有三个角是直角的四边形不一定是平面图形
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1485a4756c56f1126b9825d5019d544c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebd40be2c2e0422f6fbc1ce8de934b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb0469b312798e19c24fe494d03fb0a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e2ffa5a330a2664194a99c3ca952d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
A.①③ | B.①④ | C.②④ | D.②③ |
您最近一年使用:0次
4 . 下列结论错误的是
A.命题“若![]() ![]() ![]() ![]() |
B.命题“若![]() ![]() |
C.“![]() ![]() |
D.命题“若![]() ![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次
5 . .设函数
的定义域为D,若存在非零数
使得对于任意
有
且
,则称
为M上的
高调函数.
现给出下列命题:
①函数
为R上的1高调函数;
②函数
为R上的
高调函数
③如果定义域为
的函数
为
上
高调函数,那么实数
的取值范围是![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1215d01764a3b041d2f4497806da95d.png)
其中正确的命题是_______ .(写出所有正确命题的序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e6adff38ada1be8f2a64ad465ced3a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23087f4833258c793ddf1e9e90d77228.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff277126218e3e38d0a9890c986e7f81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
现给出下列命题:
①函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71c8726575585ccd6e00c02033825374.png)
②函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a19d6fa3789aed1a7750709cbcfabae0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
③如果定义域为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75c3204dcb6b697db534514558111f25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/318a16f1950d06e5500c76d8f81a507f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75c3204dcb6b697db534514558111f25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1215d01764a3b041d2f4497806da95d.png)
其中正确的命题是
您最近一年使用:0次
13-14高三上·辽宁抚顺·期中
解题方法
6 . 给出下列四个结论:
①若命题
,则
;
② “
”是“
”的充分而不必要条件;
③命题“若
,则方程
有实数根”的逆否命题为:“若方程
没有实数根,则
”;
④若
,则
的最小值为1.
其中正确结论的个数为( )
①若命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dba12d9b0a5b2d088dc8efc6c8147448.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cda5230d99304c2ea7055d1fec725a7.png)
② “
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/708e1fd876042f434abf6aa60a2e6345.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/815650356afb1f42207c27d3b11635f1.png)
③命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac671e6d87de2fb5f7ad3aab582866d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac671e6d87de2fb5f7ad3aab582866d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a878fd5a7104a7f42770a19097d56457.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d016344831f932253886a620e7015aca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f7266b2ef457b8ddeee3fa2cc24022e.png)
其中正确结论的个数为( )
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
2012·辽宁大连·三模
7 . 下列说法中,正确的是
A.命题“若![]() ![]() |
B.设![]() ![]() ![]() ![]() ![]() |
C.命题“存在![]() ![]() ![]() ![]() |
D.已知![]() ![]() ![]() |
您最近一年使用:0次
2016-12-02更新
|
1154次组卷
|
3卷引用:2012届辽宁省大连市第四十四中学高三模拟考试理科数学试卷
2014·辽宁沈阳·一模
8 . 下列命题正确的个数是
①“在三角形
中,若
,则
”的否命题是真命题;
②命题
或
,命题
则
是
的必要不充分条件;
③“
”的否定是“
”.
①“在三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42ab651f5dfda24c11594ed92a55df45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0298be28ab5e508504aeb3280fdf015f.png)
②命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76ee87315469251ac4f6c0910ce706d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69a92a22ff11a3f4d48f7031324935f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/216a3c4bee40f543b2d50c2a214e9f68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
③“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d150f4f9281d03624e95313de93e256c.png)
![](https://img.xkw.com/dksih/QBM/2014/10/29/1571886459715584/1571886465376256/STEM/213a9cf3f0c14cc1b54170b4d9cdfc08.png)
A.0 | B.1 | C.2 | D.3 |
您最近一年使用:0次
10-11高三上·福建厦门·阶段练习
9 . 下列命题错误的是
A.命题“若![]() ![]() ![]() |
B.若命题![]() ![]() |
C.若![]() ![]() ![]() |
D.![]() |
您最近一年使用:0次
10 . 下列结论正确的个数是
①若
,则
恒成立;
②命题“
”的否定是“
”;
③“命题
为真”是“命题
为真”的充分不必要条件.
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f7fde71807463dbdfd8fce1655a5a9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e8a38567d97681ed9614b9bec3a9cfd.png)
②命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73276cbad3d8b27ea2dc4de4d91b5382.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/435bed94e41f206eeaf38a662bd76766.png)
③“命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0045a603e555d2d2a8ef634f9edf9951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a31351c3868449fd115650c13152be8.png)
A.1个 | B.2个 | C.3个 | D.4个 |
您最近一年使用:0次