题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020308-78162.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020308-79944.gif)
(1)对于集合
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020309-72960.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020309-43237.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020309-62109.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020309-31421.gif)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020309-21806.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020310-24908.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020310-21383.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020310-44307.gif)
(1)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020310-81119.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020311-13262.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020311-47314.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020311-37565.gif)
(2)由题意x∈P是x∈S的必要条件,则
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020311-88624.gif)
若
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020312-52068.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020312-25864.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020311-88624.gif)
若
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020312-67567.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020312-33747.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020313-16747.gif)
要使
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020311-88624.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020313-27254.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020313-81266.gif)
综上,可知
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020313-81266.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020313-61373.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020309-21806.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020310-24908.gif)
解析
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020305-48720.gif)
A.充分不必要条件 | B.必要不充分条件 |
C.充要条件 | D.既不充分也不必要条件 |
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020301-82935.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020302-63639.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020302-27519.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020302-53290.gif)
A.不充分也不必要条件 | B.充分必要条件 | C.必要不充分条件 | D.充分不必要条件 |
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020254-54087.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020254-63789.gif)
(1)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020254-52971.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020255-61515.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020255-74969.gif)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020255-49784.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020255-49890.gif)
(3)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020256-31457.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020256-41844.gif)
(4)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020256-12221.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020256-75337.gif)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020250-69651.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020250-76278.gif)
A.充分不必要条件 | B.必要不充分条件 |
C.充要条件 | D.既不充分也不![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103020247-18386.gif)
A.![]() | B.![]() |
C.![]() ![]() | D.![]() ![]() |
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