2023高一·上海·专题练习
1 . 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;
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2 . 设
是定义域为R的函数,且“
,
”为假命题,则下列命题为真的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6422b9c2e93a91fe9e39ce4d9dabb0fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
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2022-11-04更新
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441次组卷
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5卷引用:上海市晋元高级中学2024届高三上学期期中数学试题