题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100541-62874.png)
(Ⅰ)当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100541-94133.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100541-14830.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100541-55915.png)
(Ⅱ)讨论函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100541-33342.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100541-82952.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100541-94133.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100541-33342.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100541-72347.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100542-64491.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100541-33342.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100542-30657.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100542-99221.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100542-18293.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100542-42681.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100541-33342.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100543-82893.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100543-73915.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100543-20591.png)
解析
试题分析:(Ⅰ)将
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100541-94133.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100543-58195.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100544-50246.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100544-12298.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100544-82743.png)
(Ⅱ)求导得:
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100544-30115.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100544-20592.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100545-26453.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100545-26453.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100545-29585.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100545-88981.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100545-94265.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100542-42681.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100542-42681.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100546-24626.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100542-64491.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100546-39613.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100541-94133.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100546-16998.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100541-33342.png)
试题解析:(Ⅰ)当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100541-94133.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100544-50246.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100546-98484.png)
且
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100546-95242.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100547-88090.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100547-61359.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100541-82952.png)
(Ⅱ)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100547-89375.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100541-94133.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100547-92921.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100541-33342.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100541-72347.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100542-64491.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100546-39613.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100548-17274.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100548-22717.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100541-33342.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100542-30657.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100542-99221.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100542-18293.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100542-42681.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100546-24626.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100548-17274.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100548-75873.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100541-33342.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100543-82893.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100543-73915.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100543-20591.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100523-27175.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100523-46517.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100523-93028.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100523-21172.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100523-98491.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100524-81926.png)
(I)求实数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100524-81671.png)
(II)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100523-98491.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100513-39939.png)
(Ⅰ)当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100514-98760.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100514-72487.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100514-92597.png)
(Ⅱ)当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100514-55139.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100514-50050.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100514-67569.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100514-20804.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100514-52139.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100452-81415.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100452-79254.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100452-52192.png)
(Ⅰ)若
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100452-39063.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100452-17932.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100452-13993.png)
(Ⅱ)若
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100452-92445.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100452-73259.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100452-34197.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100436-58120.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100436-63232.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100436-58120.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100436-39151.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100436-91004.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100437-39717.png)
A.![]() | B.![]() | C.![]() | D.![]() |
(I)求f(x)在[t,t+2](t>0)上的最小值;
(Ⅱ)证明:
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100420-96692.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018100420-89155.png)
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