题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015134325-21903.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
答案
解析
试题分析:
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015134325-21903.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015134327-36422.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015134327-24297.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015134326-90388.png)
点评:求解步骤:二次项系数化为正,找到与不等式对应的方程的根,不等式大于零取两根两边,小于零取两根中间
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015134303-51842.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015134304-90436.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015134304-75204.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015134236-75814.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015134236-31858.png)
(1)若(*)对于任意实数
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015134236-75814.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015134236-22130.png)
(2)若(*)的解集为
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015134237-10708.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015134237-18923.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015134219-68784.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015134220-80832.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015134220-74400.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015134221-46884.png)
(2)已知实数
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015134221-32168.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015134221-60817.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015134221-86351.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015134222-24491.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015134222-48178.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015134210-71070.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015134211-74824.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015134211-31569.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015134148-44363.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015134148-72056.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015134148-70350.png)
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