【题文】已知集合,则集合中的元素个数为( )A.B.C.D.
【题文】已知集合,则集合中的元素个数为( )A.B.C.D.
题型:难度:来源:
【题文】已知集合
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322191936-90465.png)
,则集合
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322191936-59387.png)
中的元素个数为( )
答案
【答案】C
解析
【解析】
试题分析:
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322191938-54802.png)
,
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322191938-65235.png)
的取值有
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322191939-98798.png)
、
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322191939-83831.png)
、
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322191939-77019.png)
、
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322191936-95913.png)
,又
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322191939-71808.png)
,
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322191940-86347.png)
值分别为
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322191938-82070.png)
、
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322191936-95913.png)
、
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322191939-77019.png)
、
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322191939-83831.png)
,故集合
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322191936-59387.png)
中的元素个数为
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322191937-30175.png)
,故选C.
考点:数的整除性
举一反三
【题文】已知全集
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322191905-38815.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322191905-93793.png)
)=( )
A.{1,3,5} | B.{2,4,6} | C.{2,4,5} | D.{2,5} |
【题文】设全集U=R,A={x|
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322191856-66604.png)
},B=
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322191857-21339.png)
,则右图中阴影部分表示的集合为( )
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322191857-51751.png)
【题文】已知M=
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322191837-65777.png)
且M
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322191837-56780.png)
,则a=( )
【题文】设全集U=R,A={x|
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322191821-56548.png)
},B=
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322191821-46639.png)
,则右图中阴影部分表示的集合为( )
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322191822-50877.png)
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