名校
1 . 命题“
,使
”的否定是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ccd7af9298cd5ff19d8866fedb42ec4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99606defee81cacc6652482953b6818c.png)
A.![]() ![]() | B.不存在![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
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2023-11-24更新
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5卷引用:甘肃省兰州市第五十九中学2024届高三上学期第三次月考数学试题
名校
2 . 下列四个结论中正确的个数是
(1)对于命题
使得
,则
都有
;
(2)已知
,则 ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03c624226d32a98c3b8abc0c34a70aef.png)
(3)已知回归直线的斜率的估计值是2,样本点的中心为(4,5),则回归直线方程为
;
(4)“
”是“
”的充分不必要条件.
(1)对于命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fbaf82fe2b22d44492a001a7a02466c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b98a571f1b8c8c9927d1aa74ac48034.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84aa95f148161958d495918558233b46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50db3c0133c87759461a1692725d208b.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28f91fc8a4a45365f769508ac4d515a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03c624226d32a98c3b8abc0c34a70aef.png)
(3)已知回归直线的斜率的估计值是2,样本点的中心为(4,5),则回归直线方程为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82855c83a440be175a5bdf065affd475.png)
(4)“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2fb40a36a293471742ce75f6b9635b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e91441146667547f9619471cbfed71da.png)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
2019-03-11更新
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1393次组卷
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7卷引用:甘肃省西北师范大学附属中学2017届高三下学期第四次校内诊断考试数学(理)试题