2023高三·全国·专题练习
1 . 已知全集
,如果命题
,那么
是________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/719a1e6a6d75578cea2e7878f00684dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/676e4e52efd65057075d80a74724b53f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
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名校
2 . 下列命题正确的是( )
A.![]() ![]() |
B.![]() ![]() |
C.线段垂直平分线上的点到这条线段两个端点的距离相等的命题的否定是真命题 |
D.至少有一个整数![]() ![]() |
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2021-10-30更新
|
311次组卷
|
4卷引用:广西河池市2021-2022学年高一上学期八校第一次联考数学试题
21-22高一·湖南·课后作业
3 . 写出下列命题的否定,并判断其真假.
(1)
:若
三条边的长分别为5,12,13,则
是直角三角形;
(2)
:面积相等的三角形都是全等三角形;
(3)
:一元二次方程至多有两个解;
(4)
:若
,则
或
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34715101c66fa12ce6baf0a9c53f1672.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a7df955fc17e92fd86302f8c34664a.png)
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20-21高二·全国·课后作业
4 . 已知全集
,如果命题
,则命题非P是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd1b007bd00bdff9b2b3dcea99f0959e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b463b0799b064c2a4f0abb391ec58bd.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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