1 . 写出下列命题的否定,并判断命题的否定的真假.
(1)
对任意的实数
,方程
有实数根;
(2)
有的三角形的三条边相等;
(3)
菱形的对角线互相垂直.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ceb28e28abf945f7c5d480222817f97.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40a01f316dd76fedb4c52895ee09f9e2.png)
您最近一年使用:0次
2022-08-30更新
|
569次组卷
|
4卷引用:四川省乐山市峨眉文旅综合高中学校2022-2023学年高一上学期第一次月考数学试题
名校
2 . 已知命题
,
,命题
,
.若p为真命题、q为假命题,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddc7823101e20f9ca671cad0e398b04b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da8d98b8b59cd9eb036d559febc7c417.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ff6177c20c34babdbb09eb3ee63beb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ada2f34d6488e0a52a3369c2a99eec3.png)
您最近一年使用:0次
2022-10-15更新
|
463次组卷
|
6卷引用:四川省广安市育才学校2022-2023学年高一上学期10月月考数学试题
3 . 已知命题
,都有
成立;命题
,使
成立.若
为真命题,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6520379d9f79fcb05a127990ba1d91f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2723350bc8cc73cc152250afe0a1f50c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d421715944263f4aa14ce3c686d92d6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e96c064d51e20b1107d81d6634a74396.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac2e4974421a8728f8e2b0a8b068e47a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2022-01-17更新
|
333次组卷
|
2卷引用:四川省南充市2021-2022学年高二上学期期末数学文科试题
名校
4 . 已知命题
;
关于
的方程
有实数根.
(1)写出命题
的否定,并判断命题
的否定的真假;
(2)若命题“
”为假命题,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d10f111fdfca44ac4ba952ba2cdfaba3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36bcb4df710cf7fc5a4159380ae5451e.png)
(1)写出命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
(2)若命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2020-01-17更新
|
223次组卷
|
3卷引用:四川省泸州市泸县第一中学2021-2022学年高二下学期入学考试数学(理)试题