题目
题型:填空题难度:简单来源:不详
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181116-50281.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181116-22425.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181116-89259.png)
值为 ______________ .
答案
解析
试题分析:根据题意,由于二次函数
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181116-50281.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181116-22425.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181116-13253.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181116-89259.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181116-80753.png)
点评:考查了二次函数的性质和不等式的综合运用,属于中档题。
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181114-38872.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181107-81785.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181107-69720.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181107-27074.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181108-87410.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181108-75586.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181108-55665.png)
(1)设
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181108-98037.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181109-91866.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181109-58604.png)
(2)如果
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181107-81785.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181107-81785.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181107-81785.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181107-81785.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181101-32565.png)
(Ⅰ)解不等式:
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181102-59276.png)
(Ⅱ)若
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181102-38141.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181102-64464.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181102-56774.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181057-60309.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181058-80792.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181058-44722.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181058-86603.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181058-54456.png)
A.a>b>c | B.c>b>a | C.b>a>c | D.c>a>b |
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181054-87254.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181054-98732.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181054-33791.png)
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