题目
题型:不详难度:来源:
设函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153806-78821.gif)
(1)当a1时,求f(x)的单调区间
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153807-34770.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153807-55284.gif)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153807-26998.gif)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153807-49948.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153808-94128.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153807-55284.gif)
(2)解:
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153808-59948.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153808-30261.gif)
①
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153808-30095.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153809-29985.gif)
②
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153809-49493.gif)
(Ⅰ).
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153809-66778.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153809-95589.gif)
(Ⅱ)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153809-99960.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153810-32002.gif)
(Ⅲ).
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153810-82402.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153810-75457.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153807-26998.gif)
核心考点
举一反三
已知函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153746-57268.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153746-44814.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153746-80194.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153746-80194.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153746-93777.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153747-44804.gif)
(Ⅰ) 求
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153746-80194.gif)
(Ⅱ)若对任意的
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153746-93777.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153747-93888.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153747-21021.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153746-80194.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153747-95314.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153748-36186.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153748-25937.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153742-36311.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153742-50118.gif)
A.在(-3,1)上![]() | B.在![]() ![]() |
C.在![]() ![]() | D.在(1,3)上![]() ![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153735-78974.gif)
(1)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153735-79795.gif)
(2)试判断是否存在实数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153735-72514.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153736-19633.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153736-63358.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153736-10567.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153736-71709.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153736-71709.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153715-44440.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153715-65416.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153716-90731.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153716-91250.gif)
已知函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153549-83903.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153549-48849.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153550-95800.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018153550-89105.gif)
A.![]() | B.![]() | C.![]() | D.不存在 |
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