名校
1 . 写出下列命题的否定,并判断所得命题的真假.
(1)
:对于任意的
,
;
(2)
:至少有一个实数
,使
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b3f9eb1ae8ab1f7e65b8f3fe778714c.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b04226b39df2f67ba1c8f0bef304d8e.png)
您最近一年使用:0次
2023-10-13更新
|
185次组卷
|
2卷引用:云南省昆明市呈贡区第一中学2023-2024学年高一上学期10月月考数学试题
名校
2 . 写出下列命题
的否定,判断真假并说明理由.
(1)
;
(2)
:不论
取何实数,关于
的方程
必有实数根;
(3)
:有的平行四边形的对角线相等.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/726eff94da919f41c6622f4ed7e1f4e7.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32f5afb8db2951e302633ff604ca6f39.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
您最近一年使用:0次
2023-09-29更新
|
78次组卷
|
2卷引用:云南省曲靖市马龙区第一中学2023-2024学年高一上学期9月月考数学试题
3 . 判断下列两个命题的真假,并写出这两个命题的否定.
(1)命题
:有些梯形的两条对角线相等;
(2)命题
:
.
(1)命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e434d52b7741e42c21c2785eb07ffcaf.png)
(2)命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89bdf1717c68cfc8a306ee79757e7e21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/769fabbc1f5c995402e5fdd57c6a930e.png)
您最近一年使用:0次
名校
4 . 判断下列命题是全称量词命题还是存在量词命题,写出这些命题的否定,并说出这些否定的真假,不必证明.
(Ⅰ)末尾数是偶数的数能被4整除;
(Ⅱ)方程
有一个根是奇数.
(Ⅰ)末尾数是偶数的数能被4整除;
(Ⅱ)方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bfcffd48bd96e513072d998b69b6629.png)
您最近一年使用:0次