解题方法
1 . 下列说法正确的是( )
A.若![]() ![]() ![]() |
B.若![]() ![]() ![]() |
C.若![]() ![]() |
D.若![]() ![]() ![]() |
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2 . 有下列几个集合:
①
;②
;③
;④
;⑤
.
其中与集合
相等的有______ .(填序号)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6c1756b564bf1d998d8179637011c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6896a6b18c44162987bcf56766a62ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fb4f0a216e16516359100661dcaa834.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1162e7a4491a90a9ee40dbe806676a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/412fae5de131f0d3e1be3dee06a08ae1.png)
其中与集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cc2e3fc4128d9d0bd788370bfbdf844.png)
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解题方法
3 . 给出下列四个命题:
①设集合
,则
;
②空集是任何集合的子集;
③集合
,
表示同一集合;
④集合
,集合
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a263d5e89becaaa2474a711da1c2c2c.png)
其中不正确的命题是( )
①设集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb0469d7d4f1b46c8c3e53f8dba71fd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc44e8f402094b7fbccaffa132b53443.png)
②空集是任何集合的子集;
③集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1c86a453cd5906d08f8269de7a83ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cedd4ba631f8530626459c454fdd2b1.png)
④集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/906a7eed297c9b6a8e1f0f60a0200dd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf811a62b1bb98260a2cc78cc867692.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a263d5e89becaaa2474a711da1c2c2c.png)
其中不正确的命题是( )
A.① | B.② | C.③ | D.④ |
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解题方法
4 . 下列说法中不正确的是______ (只需填写序号)
①设集合
,则
;
②若集合
,
,则
;
③在集合A到
的映射中,对于集合
中的任何一个元素
,在集合A中都有唯一的一个元素
与之对应;
④函数
的单调减区间是![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d028846b8614318fbf90387d13c75b5.png)
⑤设集合
,
,若
,则
①设集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cec1a82f40122b306b15aa29da2f8c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a88caacdbf71fca44d1ca412c68fa66.png)
②若集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5361ed288fa23f3b5d16cbc09d3293d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f808f81b6ea9da53d51c549be04f4267.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46a70d32c64918aa4d1d9d3ce0bdbf7b.png)
③在集合A到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
④函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77c9320d009a17deba67f208c7d8be8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d028846b8614318fbf90387d13c75b5.png)
⑤设集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a569ad6f0b7c49d11d7e167bb0527ace.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faa7b8acbc8b0027cbe9e3986ad1d859.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2ad78dc8b8aed907b4fe9640c997454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6455e38ff53ede2508e4d9cb23f0b86.png)
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