题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225711-85160.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225711-51045.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225713-24672.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225713-24148.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225714-57372.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225715-41604.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225715-55361.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225715-54336.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225716-41630.png)
A.![]() | B.![]() | C.![]() | D.![]() |
答案
解析
试题分析:结合已知条件可知,
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225713-24148.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225717-35707.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225715-55361.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225715-54336.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225717-79487.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225716-41630.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225716-74437.png)
点评:解决该试题的关键是根据新定义,得到函数的解析式,然后利用分段函数的图像与性质来得到满足题意的参数的取值范围,熟悉二次函数一次函数图像,是前提,属于中档题。
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225631-66866.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225631-16016.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225631-66866.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225631-16057.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225631-70895.png)
A.![]() | B.![]() | C.![]() | D.![]() |
已知函数
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225614-84164.png)
(1)是否存在实数
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225614-86274.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225614-83425.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225615-91951.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225615-24785.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225614-86274.png)
(2)若存在实数
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225614-86274.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225614-83425.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225615-91951.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225615-24785.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225615-94440.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225615-78537.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225616-59131.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225556-63814.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225557-34621.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225557-92935.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225534-77518.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225535-74339.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225535-56516.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225535-84682.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225536-33002.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225536-60149.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225536-69112.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225536-82508.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225537-72164.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225537-82280.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225537-78096.png)
(3)讨论关于
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225537-63292.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225538-30443.png)
如图,开发商欲对边长为
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225522-24482.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225523-54585.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225524-81835.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225524-93336.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225524-87856.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225524-37389.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225525-79080.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225525-72650.png)
(1)设
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225525-29318.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225525-87269.png)
(2)欲使
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225526-79694.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204225524-93336.png)
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