题目
题型:解答题难度:简单来源:不详
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195542-97065.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195542-32494.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195543-37443.gif)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195543-19768.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195543-73033.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195543-38136.gif)
(2)是否存在实数
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195543-38136.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195543-73033.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195543-94112.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195543-38136.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195544-65055.gif)
又
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195543-19768.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195543-73033.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195544-14440.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195544-38006.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195544-27848.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195545-80177.gif)
(2)假设存在实数
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195543-38136.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195545-69622.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195543-94112.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195545-72538.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195545-23695.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195545-76995.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195546-56995.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195546-62252.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195546-53589.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195546-90569.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195547-21777.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195543-38136.gif)
解析
核心考点
试题【已知:函数 且(1)若时,有意义,求实数的取值范围.(2)是否存在实数,使在区间上单调递减,且最大值为1?若存在,求出的值,若不存在,请说明理由.】;主要考察你对指数函数图象及性质等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195541-54327.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195538-39198.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195538-70107.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195538-70107.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195538-70381.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195538-73973.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195539-48111.png)
A 6 B 8 C 10 D12
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195536-23910.gif)
(1)若函数
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195536-23910.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195536-58722.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195536-17705.gif)
(2)若方程
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195536-82751.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195536-25783.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195536-17705.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195534-87221.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195534-24785.png)
A.3 | B.2 | C.-1 | D.-2 |
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819195533-48624.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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