【题文】满足条件{1,2,3}M{1,2,3,4,5,6}的集合M的个数是( )A.8B.7C.6D.5
题型:难度:来源:
【题文】满足条件{1,2,3}
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314045011-51352.png)
M
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314045011-51352.png)
{1,2,3,4,5,6}的集合M的个数是( )
答案
【答案】C
解析
【解析】{1,2,3,4},{1,2,3,5},{1,2,3,6},{1,2,3,4,5},{1,2,3,4,6},
{1,2,3,5,6}.
举一反三
【题文】下列关系式中,正确的关系式有几个( )
(1)
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314044959-76066.png)
∈Q (2)0
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314045000-14457.png)
N (3)
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314045000-43207.png)
{1,2} (4)φ={0}
【题文】若
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314044952-88877.png)
,
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314044952-12429.png)
,用列举法表示B
= .
【题文】集合
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314044946-90550.png)
对于集合A中任何一个元素(x, y)法则f使得(x, y)与
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314044947-80085.png)
对应,在法则f作用下集合A的象的集合是
.
【题文】下列五个写法:①
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314044938-62757.png)
②
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314044939-62378.png)
③
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314044939-73474.png)
④0
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314044939-40053.png)
⑤0
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314044939-32659.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314044939-18948.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314044940-81706.png)
其中错误写法的个数为 ( )
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