题目
题型:填空题难度:简单来源:不详
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062415-45223.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062415-75799.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062415-77944.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062415-57544.png)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062415-45223.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062415-75799.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062416-81272.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062415-57544.png)
核心考点
试题【若对任意实数恒成立,则实数的取值范围为 .】;主要考察你对一次函数的图象和性质等知识点的理解。[详细]
举一反三
已知二次函数
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062409-16635.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062409-37340.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062410-61200.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062410-17710.png)
(1)若方程
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062410-72171.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062409-16635.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062409-16635.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062409-37340.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062403-36410.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062403-30966.png)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062403-33635.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062403-33785.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062403-33785.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062404-66615.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062404-96741.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062404-96741.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062359-57070.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062400-76466.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062400-53268.png)
A.![]() | B.![]() ![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062354-30608.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062354-86993.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062355-83345.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062355-23705.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062355-60322.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062351-77850.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062351-43201.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062351-40113.png)
(Ⅰ)求a的值;
(Ⅱ)若
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819062351-17092.png)
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