题目
题型:不详难度:来源:
设
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101918-81702.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101918-55065.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101918-56479.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101919-89519.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101919-50350.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101919-72355.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101919-25895.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101920-42054.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101920-80555.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101920-61852.png)
已知“
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101920-54728.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101921-78558.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101918-81702.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101921-10306.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101921-34950.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101921-24819.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101922-31142.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101922-52682.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101922-18014.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101922-54332.png)
…………………………………………6分
又
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101923-98683.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101923-98910.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101923-10885.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101922-31142.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101923-27824.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101924-36890.png)
…………………………………10分
故所求
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101924-21419.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101924-51098.png)
解析
核心考点
举一反三
①命题“若
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101908-75805.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101908-55840.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101909-31282.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101909-96656.png)
②“
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101909-94669.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101909-23401.png)
③若“
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101910-47463.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101910-32206.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101910-98016.png)
④命题
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101910-67006.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101911-38034.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101911-76142.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101911-51075.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101858-56978.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101826-37059.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101826-30976.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101826-67311.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101827-58412.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101817-27960.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102101818-76387.png)
A.若![]() ![]() | B.若![]() ![]() |
C.若a ≤b,则![]() | D.若![]() |
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