题目
题型:解答题难度:简单来源:不详
已知集合
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093633-41682.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093633-79907.png)
(1) 若
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093633-38349.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093634-37913.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093634-59014.png)
(2) 若
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093634-73460.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093634-59014.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093635-14751.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093635-67483.png)
解析
(1)先分析
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093635-63420.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093633-38349.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093635-86645.png)
若
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093634-37913.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093635-14751.png)
(2)因为
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093634-73460.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093635-38615.png)
解:
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093635-63420.png)
(1)当
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093633-38349.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093635-86645.png)
若
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093634-37913.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093635-14751.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093634-73460.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093635-38615.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093633-38349.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093635-86645.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093636-97058.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093635-67483.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093636-60905.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093636-99434.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093636-86485.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093636-98082.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093637-68990.png)
综上
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093635-67483.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093632-78298.jpg)
A.{2} | B.{3} |
C.{-3,2} | D.{-2,3} |
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093627-96323.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093627-58632.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093627-38679.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093628-20487.png)
A.3个 | B.4个 | C.5个 | D.6个 |
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093623-33108.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093623-10715.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093623-57038.png)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093623-91570.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093623-67988.png)
(2)已知
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093624-72720.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093624-38622.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093624-88497.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093624-78394.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093619-40504.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093620-71442.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093620-29079.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093617-17370.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093617-14248.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817093617-42328.png)
A.3 | B.6 | C.8 | D.10 |
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