1 . 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
2 . 已知
,
,
.
写出命题
的否定
;
若
为真命题,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54d0e788109a9a18e1b598f5fef34cb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9395bb671c68b418ec6931cfc8366e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7e5456923795b2604e8fc05e3e098bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e26b38e357c7d985656ba7bb3c794a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f53190d6ead827a6338b9de847aeaf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97842fd0ea2ea493566e5b4e363daa5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
名校
3 . 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