【题文】(本题10分)集合,,求,,.
题型:难度:来源:
答案
解析
【解析】
试题分析:首先化简集合
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322135412-88609.png)
,然后按集合的交、并、补定义进行有序运算,特别要注意分界点的归宿,以防出错.
试题解析:
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322135412-53278.png)
,
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322135413-91381.png)
,
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322135411-91515.png)
或
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322135411-10312.png)
,
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322135411-30515.png)
或
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322135411-86568.png)
.
考点:解不等式与集合的交、并、补运算.
举一反三
【题文】(本题10分)已知集合
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322135402-96296.png)
,
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322135403-38342.png)
,若
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322135403-80019.png)
,求实数
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322135403-36361.png)
、
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322135404-36993.png)
的值.
【题文】(本题12分)已知集合
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322135345-11529.png)
,
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322135345-38149.png)
.若
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322135346-64523.png)
,求实数
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322135346-81945.png)
的取值范围.
【题文】(本题14分)设
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322135325-47209.png)
,
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322135326-80196.png)
,
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322135326-97012.png)
.
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322135326-28519.png)
,求实数
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322135327-89699.png)
的值;
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322135327-76337.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322135328-34730.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322135328-35967.png)
且
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322135328-92009.png)
,求实数
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322135327-89699.png)
的值;
(3)若
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322135329-51448.png)
,实数
![](http://img.shitiku.com.cn/uploads/allimg/20200322/20200322135327-89699.png)
的值.
最新试题
热门考点