1 . 有下述说法:①
是
的充要条件
②
是
的充要条件
③
是
的充要条件
则其中正确的说法有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26f7c54faca6eac8af5309942062058d.png)
![](https://img.xkw.com/dksih/QBM/2020/6/3/2476771100467200/2477911357054976/STEM/5115f4f51bdf43549621bc39e2e157ed.png?resizew=2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb54b1b3617ebc502cb44194cbcd1dc.png)
![](https://img.xkw.com/dksih/QBM/2020/6/3/2476771100467200/2477911357054976/STEM/5115f4f51bdf43549621bc39e2e157ed.png?resizew=2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2128a00f52af4427721f0ebba591daa.png)
![](https://img.xkw.com/dksih/QBM/2020/6/3/2476771100467200/2477911357054976/STEM/5115f4f51bdf43549621bc39e2e157ed.png?resizew=2)
A.![]() | B.1个 | C.2个 | D.3个 |
您最近一年使用:0次
2020-06-05更新
|
192次组卷
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3卷引用:四川省自贡市田家炳中学2019-2020学年高二下学期期中考试数学试题
四川省自贡市田家炳中学2019-2020学年高二下学期期中考试数学试题四川省自贡市田家炳中学2022-2023学年高二下学期期中数学试题(已下线)1.4.2 充要条件(分层练习)-2021-2022学年高一数学教材配套学案+练习(人教A版2019必修第一册)
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2 . 有限集S中的元素个数记作
,设A、B是有限集合,给出下列命题:
(1)
的充分不必要条件是
;
(2)
的必要不充分条件是
;
(3)
的充要条件是![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70135fccebb89692c71545c7610453fc.png)
其中假命题是(写题号)________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/824dc88e8fa0803c32405e964f884c11.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dea9a4259cca10c1f5af28e621ebafd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c10471fdfa9693ced19e2077dd641a.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2ad78dc8b8aed907b4fe9640c997454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2e606b3fa4b1a5af6fdf88d317338b.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46a70d32c64918aa4d1d9d3ce0bdbf7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70135fccebb89692c71545c7610453fc.png)
其中假命题是(写题号)
您最近一年使用:0次
2019高二上·全国·专题练习
3 . 已知
,
,则“
”是“直线
与直线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd385ff0f4ba5ce1e7280134502e245.png)
垂直”的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b495135e6675ba5ff1d6f69f037429a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99a8d398f336ab507c78838e4b81a473.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5be97cd1c7111b654d87d8fbb63b6a84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eab29c11c77cc750bef862dba270b3b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd385ff0f4ba5ce1e7280134502e245.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6a770a92929ebd7071a36a25a363c2a.png)
A.充分不必要条件 | B.必要不充分条件 |
C.充要条件 | D.既不充分也不必要条件 |
您最近一年使用:0次