题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122521-73251.png)
(1)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122521-73251.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122521-61723.png)
(2)求
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122522-77310.png)
(3)若
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122522-68491.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122522-76301.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122522-78297.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122522-33422.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122522-76301.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122521-73251.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122521-61723.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122523-40510.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122523-49276.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122522-77310.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122523-83609.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122523-87844.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122522-77310.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122523-88219.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122523-70739.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122522-76301.png)
解析
试题分析:(1)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122521-73251.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122521-61723.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122522-76301.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122523-37958.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122522-77310.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122524-64089.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122524-58861.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122522-77310.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122524-64089.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122524-73251.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122524-73251.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122522-33422.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122522-78297.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122524-40373.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122524-97085.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122522-78297.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122522-76301.png)
试题解析:(1)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122525-29137.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122525-55884.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122525-83969.png)
函数
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122521-73251.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122521-61723.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122525-30913.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122525-55884.png)
若
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122523-49276.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122525-18621.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122522-77310.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122523-83609.png)
若
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122523-87844.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122526-77128.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122526-12531.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122526-34731.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122525-18621.png)
所以,
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122522-77310.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122523-88219.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122523-70739.png)
(3)由于
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122522-68491.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122526-81630.png)
故当
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122522-78297.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122527-85480.png)
令
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122524-97085.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122527-81327.png)
函数
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122527-50054.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122527-58731.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122528-43051.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122528-27365.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122527-58731.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122528-27222.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122527-58731.png)
设此零点为
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122528-19352.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122528-95662.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122529-50644.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122529-49863.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122529-44939.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122529-34254.png)
所以,
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122529-37708.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122527-58731.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122530-33158.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122530-94993.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122530-65666.png)
所以,
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122530-87248.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122530-53855.png)
故整数
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122522-76301.png)
核心考点
举一反三
A.(0,-2) | B.(1,1) | C.(1,4) | D.(-1,-4) |
A.2![]() | B.2 | C.![]() | D.1 |
A.充分不必要条件 |
B.必要不充分条件 |
C.充要条件 |
D.既不充分也不必要条件 |
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122454-51975.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017122454-51975.png)
A.-2 | B.1 | C.-![]() | D.-1 |
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