1 . ∃a∈Z,使关于x的分式方程
的解为正数,且∀y<-2,关于y的不等式组
成立.求符合条件的a的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfd9f3b23976af8f6873eed3f627080.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ebf3891214dcfddc60a7eeb25e459e3.png)
您最近一年使用:0次
名校
2 . 设
,关于
,
的方程组
,下列命题中是真命题的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12b59e3282fc6936e74dcc5388702b28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ffb694021b52653de5141ae27ba6d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fcf9bfbf771cb6118f8e631724314e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4ccc89a17daa9d441ad7b126cca77d5.png)
A.存在![]() | B.对任意![]() |
C.对任意![]() | D.存在![]() |
您最近一年使用:0次
名校
3 . 下列命题是全称量词命题且为真命题的是( )
A.![]() |
B.![]() |
C.所有圆的圆心到其切线的距离都等于半径 |
D.对任意![]() ![]() |
您最近一年使用:0次
2023-10-31更新
|
113次组卷
|
2卷引用:云南省曲靖市会泽县实验高级中学校2023-2024学年高一上学期9月月考数学试题
名校
4 . 已知命题
对任意
,总有
,
是不等式
的解,则下列命题为真命题的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d37660096fb35820bc02bb27d58195fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/106a86e19ffb10da640b7bca6cd665b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e541ea2f855f981c96207070683d388.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
5 . 判断下列全称量词命题的真假,并说明理由.
(1)
时,则
;
(2)任意一个实数乘以
都等于它的相反数;
(3)对任意实数
,
,
,关于
的方程
都有两个实数解.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60c044c384b993788b25e254b768a701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8f91800665d772fa23d5168954fa0c1.png)
(2)任意一个实数乘以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
(3)对任意实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13fa32c1e926f40a0722d106563777ef.png)
您最近一年使用:0次
6 . (1)“
,使得方程
有两个不同的实数解”是真命题,求集合A.
(2)若命题“
,
”为真命题,求实数a的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a5581fc420e0d340f8948817b5ad235.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc75dcb764833ca2a1eeb3d533bdf41c.png)
(2)若命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/659f6511c71f5b1bdf784d865934c33d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/badab08664c0a5fd3d6da6c46a987ffc.png)
您最近一年使用:0次