题目
题型:解答题难度:一般来源:不详
设集合
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093139-75856.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093140-90968.png)
(1)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093140-20171.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093140-15054.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093140-52656.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093141-97871.png)
解析
(1)要使
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093140-20171.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093141-65967.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093141-19879.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093141-21419.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093141-77903.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093141-75427.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093142-28920.png)
要使
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093140-15054.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093142-46094.png)
解:(1)要使
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093140-20171.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093141-65967.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093141-19879.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093141-21419.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093142-59814.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093140-52656.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093141-77903.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093141-75427.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093142-28920.png)
要使
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093140-15054.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093142-46094.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093142-70984.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093142-82840.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093142-59814.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093141-97871.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093135-99503.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093135-51925.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093136-48565.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093133-60233.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093133-28636.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093129-26811.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093130-55307.png)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093130-23931.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093130-46454.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093130-51215.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093130-46454.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093125-86368.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093126-10211.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093126-16080.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093126-86375.png)
A.![]() | B.![]() | C.![]() | D.![]() |
A.{x|-2≤x<4} | B.{x|x≤3或x≥4} | C.{x|-2≤x<-1} | D.{x|-1≤x≤3} |
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