题目
题型:解答题难度:一般来源:不详
已知
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045949-49784.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045949-73906.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045949-28538.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045949-49825.png)
(1)求当
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045950-99935.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045950-92663.png)
(2)作出函数
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045950-92663.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045950-19252.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045950-92663.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045950-64740.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045950-75609.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045951-72511.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045951-30479.png)
解析
解:(1)当
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045951-23657.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045951-30647.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045951-73086.png)
因为
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045949-49784.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045950-19252.png)
(2)由(1)知
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045952-33472.png)
由图可知:
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045950-92663.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045950-64740.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045950-75609.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045951-72511.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045951-30479.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045952-49852.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045947-72221.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045947-50151.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045947-59233.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045947-90892.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045944-77902.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045944-21034.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045945-56115.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045945-64397.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045945-44544.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045941-65391.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045941-98534.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045941-69049.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045941-65122.png)
A.![]() | B.![]() |
C.![]() | D.不确定 |
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045937-37463.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045930-49885.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045931-19859.png)
(1)判断
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045931-14111.png)
(2)判断
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045931-14111.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045931-31694.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045931-45032.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045931-45032.png)
(3)若
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045931-64076.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818045932-70284.png)
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