题目
题型:解答题难度:一般来源:不详
已知
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050526-63211.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050526-88255.gif)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050526-64392.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050526-60565.gif)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050526-60565.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050527-25171.gif)
(3)若
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050526-60565.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050527-25171.gif)
答案
(1)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050526-60565.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050527-25284.gif)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050527-90004.gif)
(3)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050527-34397.gif)
解析
(1)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050526-60565.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050527-25284.gif)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050526-60565.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050527-25284.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050527-31181.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050527-90004.gif)
(3)a>1时,
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050526-60565.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050526-60565.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050526-60565.gif)
即
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050527-25284.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050528-80668.gif)
得
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050527-34397.gif)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050521-85914.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050521-43584.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050521-65776.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050521-89844.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050523-40520.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050523-49685.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050523-42770.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050523-26765.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050524-23514.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050524-80067.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050518-29405.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050518-58236.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050519-92869.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050519-52797.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050519-29699.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050519-89094.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050519-37263.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050520-15994.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050519-37263.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050520-98504.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050513-49344.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050512-68588.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050510-98167.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821050510-96659.png)
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