题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194019-33499.gif)
(1)判断函数
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194020-19205.gif)
(2)判断函数
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194020-19205.gif)
(3)已知
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194020-61691.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194020-84861.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194020-44014.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194020-19205.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194020-19205.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194021-90284.gif)
(3)故当
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194021-95674.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194021-80880.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194022-37929.gif)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194022-28131.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194020-19205.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194021-90284.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194022-96968.gif)
所以函数
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194020-19205.gif)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194023-40733.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194023-99974.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194023-33320.gif)
所以函数
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194020-19205.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194021-90284.gif)
注:也可以用导数知识判断.
(3)因
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194024-55295.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194024-98791.gif)
考虑到
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194020-19205.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194021-90284.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194024-90637.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194024-60427.gif)
当
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194021-95674.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194025-60241.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194025-34444.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194025-31721.gif)
当
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194022-37929.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194026-26757.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194026-32187.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194026-89056.gif)
故当
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194021-95674.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194021-80880.gif)
当
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194022-37929.gif)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194005-66747.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194005-30547.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194006-94998.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194006-51148.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194006-78096.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194007-36050.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205194005-66747.gif)
(Ⅱ)求生产多少台时,盈利最多?
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205193937-93045.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205193937-48754.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205193937-26810.gif)
(I)求证:M点的纵坐标为定值;
(Ⅱ)若
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205193938-49270.gif)
(Ⅲ)已知
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205193938-45918.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205193938-14324.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205193938-26119.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205193939-55661.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205193859-45805.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205193859-10606.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205193900-27087.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205193900-46463.gif)
(1)求k、b的值;
(2)求不等式f(x)>g(x)的解集M;
(3)当
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205193900-25734.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205193901-86747.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205193840-18557.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205193840-22494.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205193840-47640.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205193841-42097.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205193841-21103.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205193841-75880.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205193840-18557.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205193842-55903.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205193841-75880.gif)
已知函数
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205193842-66405.gif)
(1)当
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205193842-26230.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205193842-60077.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205193843-40509.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205193842-60077.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205193843-40509.gif)
(2)若函数
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205193842-60077.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205193843-12121.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205193843-95636.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205193835-56622.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205193835-14040.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205193835-73229.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200205/20200205193836-40316.gif)
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