【题文】已知集合 A=( ▲ )
【题文】已知集合 A=( ▲ )
题型:难度:来源:
【题文】已知集合 A=
![](http://img.shitiku.com.cn/uploads/allimg/20200323/20200323144447-62247.png)
( ▲ )
![](http://img.shitiku.com.cn/uploads/allimg/20200323/20200323144447-79094.png)
答案
【答案】C
解析
举一反三
【题文】设全集
![](http://img.shitiku.com.cn/uploads/allimg/20200323/20200323144430-62307.gif)
,集合
![](http://img.shitiku.com.cn/uploads/allimg/20200323/20200323144430-73108.gif)
,
![](http://img.shitiku.com.cn/uploads/allimg/20200323/20200323144431-52106.gif)
,则实数
![](http://img.shitiku.com.cn/uploads/allimg/20200323/20200323144431-97492.gif)
的值是 ( )
A.2 | B.8 | C. 或8 | D.2或8 |
【题文】
![](http://img.shitiku.com.cn/uploads/allimg/20200323/20200323144423-66453.gif)
A.{x|x<-1或x>2}![](http://img.shitiku.com.cn/uploads/allimg/20200323/20200323144423-14585.gif) | B.{x|x≤-1或x>2} |
C.{x|x<-1或x≥2} | D.{x|x≤-1或x≥2} |
【题文】若集合
![](http://img.shitiku.com.cn/uploads/allimg/20200323/20200323144341-79769.png)
= ( )
【题文】已知集合
![](http://img.shitiku.com.cn/uploads/allimg/20200323/20200323144334-75523.png)
R
![](http://img.shitiku.com.cn/uploads/allimg/20200323/20200323144334-76251.png)
,
![](http://img.shitiku.com.cn/uploads/allimg/20200323/20200323144334-73265.png)
Z
![](http://img.shitiku.com.cn/uploads/allimg/20200323/20200323144334-76251.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200323/20200323144334-62407.png)
,则
![](http://img.shitiku.com.cn/uploads/allimg/20200323/20200323144334-89771.png)
A.(0,2) | B.[0,2] | C.{0,2} | D.{0,1,2} |
【题文】集合
![](http://img.shitiku.com.cn/uploads/allimg/20200323/20200323144318-41643.png)
,Q={
![](http://img.shitiku.com.cn/uploads/allimg/20200323/20200323144318-16588.png)
},则
![](http://img.shitiku.com.cn/uploads/allimg/20200323/20200323144318-86923.png)
( )
A.P | B.Q | C.{—1,1} | D.![](http://img.shitiku.com.cn/uploads/allimg/20200323/20200323144318-32019.png) |
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