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1 . 下列命题中的真命题有( )
A.已知![]() ![]() ![]() |
B.已知命题![]() ![]() ![]() ![]() |
C.设![]() ![]() ![]() ![]() ![]() |
D.“![]() ![]() |
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2 . 命题
:
,
,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0c7a319f1fb9ef4cd6bd9eb5ab0c53b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5fe9232dd6a05152f2bc28a56f14595.png)
A.![]() ![]() ![]() | B.![]() ![]() ![]() |
C.![]() ![]() ![]() | D.![]() ![]() ![]() |
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2017-11-19更新
|
633次组卷
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5卷引用:江西省南昌市第二中学2019-2020学年高二上学期期中数学(理)试题
3 . 若命题p:
,
,则该命题的否定是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7142f4468a21b0dff082c9cdf5540a9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06960ac032d53fe7cf9e2761800875be.png)
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
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4 . 下列四个命题:
①命题“若
,则
”的逆否命题为“若
,则
”;
②若“
或
”是假命题,则“
且
”是真命题;
③若
:
,
:
,则
是
的充要条件;
④已知命题
:存在
,使得
成立,则
:任意
,均有
成立;
其中正确命题的个数是
①命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c581913b2d08b871608e939f29cb24b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e30c903d8f8a05332af0b19e7e40df3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/059eafaba1bb419030b566813c5bb04a.png)
②若“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.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/9e26b38e357c7d985656ba7bb3c794a5.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ded6d634c9b3cba8776fee60132acbe1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/558143696cf36ff78ef9124ef2901aec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
④已知命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dba05bd022040d172f2f63ad429b7a40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b652287dd232f8c16d980143eaf8361.png)
其中正确命题的个数是
A.1 | B.2 | C.3 | D.4 |
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2018-01-04更新
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480次组卷
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4卷引用:江西省广昌三中、 南丰二中、金溪二中、崇仁二中2021-2022学年高二下学期期中联考数学(文)试题
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5 . 已知命题
,命题
,则下列判断正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dc31aab25e96d969222b7be624121f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/007697485fa188d97daa09931fc55377.png)
A.命题![]() | B.命题![]() |
C.命题![]() | D.命题![]() |
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6 . 下列有关命题的说法错误的是
A.命题“若![]() ![]() ![]() ![]() |
B.“![]() ![]() |
C.若![]() ![]() ![]() |
D.对于命题![]() ![]() ![]() ![]() |
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2016-12-03更新
|
1805次组卷
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2卷引用:江西省峡江中学2021-2022学年高二11月期中考试数学(理)试题
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7 . 下列命题正确的是( )
A.命题:若![]() ![]() ![]() ![]() |
B.命题:![]() ![]() ![]() ![]() |
C.命题:存在四边相等的四边形不是正方形,该命题是假命题. |
D.命题:![]() ![]() |
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2016-12-04更新
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240次组卷
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3卷引用:2015-2016学年江西省赣州市十三县高二下学期期中文科数学试卷
8 . 命题“
”的否定是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9f1423dc5fea9ac68d0e145ea15051e.png)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
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2016-12-03更新
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389次组卷
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5卷引用:2015-2016学年江西省吉安市一中高二上期中理科数学试卷
9 . 写出命题“
”的否定______________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6973c7a1d995eaf4662078259a67812.png)
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10 . 下列有关命题中说法错误的是
A.命题“若![]() ![]() ![]() ![]() |
B.“![]() ![]() |
C.若![]() ![]() ![]() |
D.对于命题![]() ![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次