【题文】若集合,则= .
【题文】若集合,则= .
题型:难度:来源:
【题文】若集合
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322180814-44390.png)
,则
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322180815-20849.png)
=
.
答案
【答案】
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322180815-80568.png)
解析
【解析】
试题分析:因为集合M为求函数定义域,由
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322180815-85899.png)
,得
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322180815-53512.png)
因为集合N为求函数定义域,由
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322180815-53476.png)
,得
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322180816-34278.png)
因此
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322180816-25314.png)
考点:集合的运算
举一反三
【题文】已知全集
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322180752-19698.png)
( )
【题文】已知集合
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322180740-27270.png)
,
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322180740-84438.png)
,
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322180740-28137.png)
为虚数单位,若
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322180740-94154.png)
,则纯虚数
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322180741-82007.png)
为( )
【题文】已知集合
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322180724-88104.png)
,则
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322180724-12802.png)
( ).
【题文】设集合A={
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322180534-46919.png)
},B={
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322180535-19875.png)
},则
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322180535-64204.png)
A.(2,+∞) | B.[2,+∞) | C.![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322180535-56624.png) | D.R |
【题文】设集合
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322180529-24468.png)
,则
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322180529-17465.png)
( )
A.[1,2] | B.![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322180529-22634.png) | C.(1,2] | D.(1,2) |
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