【题文】设集合,,则下列关系中正确的是( )A.B.C.D.
【题文】设集合,,则下列关系中正确的是( )A.B.C.D.
题型:难度:来源:
【题文】设集合
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322155439-87262.png)
,
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322155439-86917.png)
,则下列关系中正确的是( )
答案
【答案】B
解析
【解析】
试题分析:已知
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322155439-87262.png)
,
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322155440-13434.png)
,显然
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322155440-29230.png)
,故选B.
考点:集合的关系.
举一反三
【题文】已知集合
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322155420-10619.png)
,则
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322155420-72198.png)
等于( )
A.{-1,0,1} | B.{1} | C.{-1,1} | D.{0,1} |
【题文】函数
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322155407-84705.png)
的定义域为集合
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322155407-81781.png)
,
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322155407-27805.png)
,
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322155408-93219.png)
.
(1)求集合
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322155407-81781.png)
及
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322155408-42716.png)
.
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322155408-75989.png)
,求
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322155408-71409.png)
的取值范围.
【题文】已知函数
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322155353-52178.png)
,集合
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322155353-99221.png)
,集合
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322155353-13588.png)
,则集合M ∩ N的面积是( )
A.![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322155354-96396.png) | B.![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322155354-48403.png) | C.π | D.2π |
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