1 . 已知命题
:存在
,
.
(1)命题
的否定为________;
(2)若命题
是真命题,则实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb63478132d4c1fef3c17e591919da83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e99aaea5595db1e5a12c8a1113cfffe4.png)
(1)命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
(2)若命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2 . 已知命题:“
,
”为假命题,则实数
的取值范围是_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ccd7af9298cd5ff19d8866fedb42ec4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e99aaea5595db1e5a12c8a1113cfffe4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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3 . 已知命题
.则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2c186ce2a53c9f936718b8765d9ba15.png)
A.p为真命题,命题p的否定:![]() |
B.p为假命题,命题p的否定:![]() |
C.p为真命题,命题p的否定:![]() |
D.p为假命题,命题p的否定:![]() |
您最近一年使用:0次
2023-10-30更新
|
121次组卷
|
3卷引用:贵州省仁怀市第四中学2023-2024学年高一上学期10月月考数学试题
2023高一·上海·专题练习
4 . 写出下列命题的否定:
(1)
且
;
(2)
的解是
或
;
(3)梯形的对角线相等;
(4)存在一个四边形没有外接圆;
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/224d896999224ff4ec5074ebeb83b885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3575b6eb8c5d4c5a66abbf94d8e50bec.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8034dddd265a186e29172623e3b9eadf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55aa0a20848c37c1892c567b2315e04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef00713e73b8357cc7900144f5505bc6.png)
(3)梯形的对角线相等;
(4)存在一个四边形没有外接圆;
您最近一年使用:0次
2023高一·江苏·专题练习
5 . 已知命题
,若p的否定为假命题,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b423a2f622c35390426b27c3c744c9ec.png)
您最近一年使用:0次
2023高一·江苏·专题练习
6 . 已知命题
,若p的否定为真命题,则实数m的取值范围为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08dedca1f8d91367a940763f8070ac7f.png)
您最近一年使用:0次
2023高一·江苏·专题练习
7 . 写出下列命题的否定,并判断所得命题的真假性.
(1)
,
;
(2)每一个平行四边形都是中心对称图形;
(3)
,
;
(4)
,
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4dbe9afeae563561806eac216ee841f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efee86e465f6092293c8e3b8cedc4de5.png)
(2)每一个平行四边形都是中心对称图形;
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ccd7af9298cd5ff19d8866fedb42ec4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9064a630efb47422dfe8cafaeab18728.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ccd7af9298cd5ff19d8866fedb42ec4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01199e52ea8ed44a69b8dd76e3567704.png)
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8 . 命题“
,
”的否定是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bded4e08a5c75fd82f1868c9f4c5b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd2074466a733d7a117903b9216f3971.png)
A.![]() ![]() | B.![]() ![]() | C.![]() ![]() | D.![]() ![]() |
您最近一年使用:0次
9 . 下列命题中为真命题的是( )
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
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10 . 已知命题
:
,
,则命题
的否定为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ccd7af9298cd5ff19d8866fedb42ec4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40b07b30da46530478e51d87a685a0e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
A.![]() ![]() | B.![]() ![]() ![]() |
C.![]() ![]() | D.![]() ![]() ![]() |
您最近一年使用:0次
2023-10-23更新
|
165次组卷
|
2卷引用:辽宁省沈阳市第二中学2023-2024学年高一上学期9月月考数学试题