题目
题型:填空题难度:简单来源:不详
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819182006-67163.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819182007-89258.png)
解析
试题分析:因为
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819182006-67163.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819182007-17827.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819182007-57296.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819182008-53704.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819182008-53704.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819182007-89258.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819182007-89258.png)
点评:解决该试题的关键是对于形如二次函数的指数不等式的求解运用。
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819182000-16852.png)
(Ⅰ)讨论函数
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819182000-80085.png)
(Ⅱ)当
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819182000-29316.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819182000-80085.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819182000-21031.png)
(Ⅲ)若
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819182000-80085.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819182000-62842.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819182001-99856.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819182001-51279.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819182001-72347.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819182001-79301.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819182002-95714.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181958-22702.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181958-40005.png)
A.一个 | B.至少一个 | C.至多两个 | D.至多一个 |
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181948-18719.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181948-54345.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181948-26055.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181949-25105.png)
则称
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181949-52723.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181949-31450.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181949-31450.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181948-18719.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181949-14735.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181949-70225.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181950-77330.png)
是 .
已知函数
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181939-23525.png)
(1)求实数
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181939-43572.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181939-24196.png)
(2)证明
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181940-15314.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181940-27567.png)
(3)已知
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181940-69269.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181940-77587.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181940-79178.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181941-63068.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819181935-68683.png)
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