题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102072911-88834.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102072912-81066.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102072912-61015.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102072912-71557.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102072912-43631.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102072913-18384.png)
解析
试题分析:先由函数定义域及不等式的恒成立条件可得
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102072913-13642.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102072912-43631.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102072913-18384.png)
试题解析:
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102072913-69936.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102072913-56365.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102072914-90882.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102072914-27198.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102072914-21753.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102072914-48996.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102072915-64531.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102072913-13642.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102072913-18384.png)
核心考点
举一反三
A.命题“若![]() ![]() |
B.“x=1”是“![]() |
C.若![]() |
D.对于命题![]() ![]() ![]() |
A.命题“若![]() ![]() |
B.命题“![]() ![]() ![]() ![]() |
C.命题“![]() ![]() ![]() ![]() |
D.已知![]() ![]() ![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102072820-47585.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102072820-72610.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102072752-66349.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102072752-77754.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102072739-22467.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102072740-67454.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102072740-79821.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102072740-47011.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102072740-90107.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102072741-20843.png)
(1)若命题
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102072739-22467.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102072741-78151.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102072739-22467.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102072740-47011.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102072741-78151.png)
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