题目
题型:不详难度:来源:
已知命题
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072337-64968.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072337-55685.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072337-72106.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072337-65471.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072337-55685.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072338-21393.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072338-43952.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072338-39363.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072339-76257.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072339-51979.png)
解析
先根据已知条件,得到
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072339-22653.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072339-83681.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072340-88196.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072340-84642.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072340-63854.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072340-53664.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072340-88196.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072340-84642.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072340-63854.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072340-53664.png)
解:令
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072341-33201.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072339-83681.png)
∵ “若
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072340-88196.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072340-84642.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072340-63854.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072340-53664.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072340-88196.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072340-84642.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072340-63854.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072340-53664.png)
∴AÞ B ,故
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072339-51979.png)
核心考点
举一反三
已知实数
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072327-56435.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072327-27857.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072328-97422.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072328-32959.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072328-20655.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072328-54946.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072328-64314.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072328-46150.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072328-79090.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072328-34983.png)
A.命题“若![]() ![]() |
B.命题“![]() ![]() ![]() ![]() ![]() ![]() |
C.命题“![]() ![]() ![]() ![]() |
D.已知![]() ![]() ![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072313-53926.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072313-97964.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072313-70059.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072313-50911.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072313-66618.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072313-80511.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072314-17986.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072314-97887.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072314-48978.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072313-97964.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072313-70059.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072314-64758.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072315-89546.png)
设命题
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072306-98799.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072306-11493.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072307-35568.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072307-80224.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072306-11493.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072307-88145.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072307-21721.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072306-11493.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072300-39770.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103072301-96550.png)
A.p是假命题;![]() ![]() ![]() |
B.p是假命题;![]() ![]() ![]() |
C.p是真命题;![]() ![]() ![]() |
D.p是真命题;![]() ![]() ![]() |
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