题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120631-69556.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120631-17883.png)
的单调递减区间为( )
A.![]() | B.![]() | C.![]() | D.![]() |
答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120632-33291.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120632-54380.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120633-76955.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120632-33291.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120633-21808.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120633-12032.png)
函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120631-17883.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120633-57965.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120632-49172.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120616-13868.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120616-81856.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120616-87286.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120616-54292.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120616-50788.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120617-21172.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120617-35538.png)
(Ⅱ)设函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120617-84797.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120617-24902.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120617-35538.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120617-99498.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120617-60872.png)
(Ⅲ)当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120617-37402.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120617-35538.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120618-60938.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120617-35538.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120557-46392.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120558-51303.png)
(Ⅰ)若函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120558-79238.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120558-66335.png)
(Ⅱ)设直线
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120558-31729.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120558-27251.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120558-81374.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120559-53510.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120559-97792.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120558-31729.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120559-45037.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120544-54097.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120545-82841.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120545-65386.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120545-74665.png)
(1)若对任意
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120545-64945.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120545-38391.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120546-60156.png)
(2)在(1)的条件下,当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120546-60156.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120546-14248.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120546-61415.png)
(3)求证:对任意的
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120546-89205.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120547-60948.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120540-30538.png)
A.![]() | B.![]() | C.![]() | D.(0,2) |
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120520-20882.png)
(1)当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120520-75713.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120521-34384.png)
(2)令
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120521-25326.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120521-88090.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120521-20705.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120521-51706.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120521-77867.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120522-39919.png)
(3)当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120522-78192.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120522-27021.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120522-58516.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018120523-83150.png)
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