题目
题型:解答题难度:简单来源:不详
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182703-71052.gif)
(1)令
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182703-16756.gif)
(2)求该函数的值域.
答案
(1)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182703-28380.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182703-53558.gif)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182704-65497.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182704-59371.gif)
=
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182704-12147.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182704-69061.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182704-74031.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182705-74215.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182705-29849.gif)
令
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182703-16756.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182705-47200.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182706-61966.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182706-97379.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182706-49913.gif)
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182706-29203.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182706-40385.gif)
当
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182707-19141.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182707-53659.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182707-70905.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182703-53558.gif)
核心考点
举一反三
(Ⅰ)当
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182656-83534.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182656-41589.gif)
(Ⅱ)若
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182656-41589.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182657-12704.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182657-87274.gif)
①当
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182650-27615.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182650-20990.gif)
②若函数
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182650-20990.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182650-97444.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182650-59180.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182640-52778.gif)
(1)求证:不论
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182641-65372.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182641-68011.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182641-65372.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182641-68011.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182641-68011.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182641-68011.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182637-60085.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182637-19077.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182637-92582.gif)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182633-20525.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182633-36926.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182633-47712.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182633-47712.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182633-39535.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182633-20525.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817182633-66043.gif)
A.![]() | B.![]() | C.![]() | D.![]() |
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