题目
题型:解答题难度:简单来源:不详
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160224-19449.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160224-29383.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160224-23007.png)
(Ⅰ)求
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160224-29529.png)
(Ⅱ)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160224-65845.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160225-76768.png)
(Ⅲ)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160225-48840.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160225-78277.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160225-55213.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160224-29529.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160225-45178.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160226-37869.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160224-29529.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160224-29529.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160226-60828.png)
(Ⅱ)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160226-58729.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160226-74073.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160226-51274.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160224-65845.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160227-58666.png)
(Ⅲ)略
解析
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160224-19449.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160224-29529.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160224-65845.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160225-76768.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160226-58729.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160225-76768.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160227-39249.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160227-49753.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160227-70357.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160225-48840.png)
核心考点
举一反三
A.a>5,或a<2 | B.2<a<5 | C.2<a<3,或3<a<5 | D.3<a<4 |
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160214-60226.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160214-42256.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160214-93596.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160210-40633.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160206-88786.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160201-59702.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160201-69435.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160201-58732.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160201-10706.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160201-19689.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160202-53289.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160202-19923.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160202-71676.png)
(Ⅰ)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160202-71676.png)
(Ⅱ)令
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160202-83619.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820160202-34601.png)
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