【题文】若集合= ( )A.B.C.[—1,0]D.
【题文】若集合= ( )A.B.C.[—1,0]D.
题型:难度:来源:
【题文】若集合
![](http://img.shitiku.com.cn/uploads/allimg/20200323/20200323144602-64670.png)
= ( )
答案
【答案】A
解析
【解析】本题考查集合的含义及运算.
解方程
![](http://img.shitiku.com.cn/uploads/allimg/20200323/20200323144603-67833.png)
得
![](http://img.shitiku.com.cn/uploads/allimg/20200323/20200323144603-82588.png)
,所以
![](http://img.shitiku.com.cn/uploads/allimg/20200323/20200323144603-82131.png)
解不等式
![](http://img.shitiku.com.cn/uploads/allimg/20200323/20200323144603-26233.png)
得
![](http://img.shitiku.com.cn/uploads/allimg/20200323/20200323144603-88369.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20200323/20200323144603-88463.png)
则
![](http://img.shitiku.com.cn/uploads/allimg/20200323/20200323144604-77809.png)
故选A
举一反三
【题文】已知全集
![](http://img.shitiku.com.cn/uploads/allimg/20200323/20200323144553-83625.png)
= ( )
A.{1,2} | B.{5} | C.{1,2,3} | D.{3,4,6} |
【题文】设全集U=R,A=
![](http://img.shitiku.com.cn/uploads/allimg/20200323/20200323144547-76064.png)
,则右图中阴影部分表示的集合为 ( )
![](http://img.shitiku.com.cn/uploads/allimg/20200323/20200323144548-66336.png)
【题文】设全集U=R,
![](http://img.shitiku.com.cn/uploads/allimg/20200323/20200323144543-47933.png)
则( )
【题文】若集合
![](http://img.shitiku.com.cn/uploads/allimg/20200323/20200323144531-82273.png)
,
![](http://img.shitiku.com.cn/uploads/allimg/20200323/20200323144531-82841.png)
,则A∩B =
A.[0,1] | B.[0,+∞) | C.[-1,1] | D.![](http://img.shitiku.com.cn/uploads/allimg/20200323/20200323144531-10770.png) |
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