题目
题型:解答题难度:一般来源:不详
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040301-98615.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040301-81120.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040301-31228.png)
(Ⅰ)求
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040301-31376.png)
(Ⅱ)证明:
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040301-40700.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040301-31228.png)
(Ⅲ)解不等式:
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040302-58273.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040302-61732.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040302-42742.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040302-55580.png)
解析
试题分析:(1)根据
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040301-40700.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040302-45072.png)
试题解析:(Ⅰ)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040303-91950.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040301-81120.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040301-31228.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040303-56093.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040303-30863.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040302-61732.png)
(Ⅱ)由(Ⅰ)知
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040303-50397.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040303-66421.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040303-50457.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040304-51257.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040304-59635.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040304-65911.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040304-77158.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040304-73703.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040305-78278.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040305-10326.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040305-37173.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040305-98027.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040305-70996.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040301-40700.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040301-31228.png)
(Ⅲ)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040306-77499.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040306-77405.png)
因为
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040306-27127.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040306-72001.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040306-84830.png)
因为
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040301-40700.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040301-31228.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040307-25743.png)
即
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040307-53121.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040302-42742.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040302-55580.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040252-43556.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040252-32650.png)
A.(-∞,-1) | B.(![]() | C.(![]() | D.(0,2![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040247-87041.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040247-37254.png)
A.(-∞,-1) | B.(![]() | C.(![]() | D.(0,2![]() |
A.![]() | B.![]() | C.![]() | D.![]() |
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040238-52859.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040238-20220.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040238-19945.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040238-70241.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818040239-81697.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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