题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124944-26164.png)
(Ⅰ)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124944-18824.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124944-89565.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124944-18824.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124945-35678.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124945-77369.png)
(Ⅱ)若
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124945-91659.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124945-77369.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124945-84575.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124946-16363.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124946-51559.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124946-37595.png)
解析
试题分析:(Ⅰ)由题意知,函数
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124944-18824.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124946-18087.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124945-77369.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124944-89565.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124945-35678.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124947-41591.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124947-28045.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124947-39631.png)
试题解析:(Ⅰ)因为
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124945-77369.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124947-64037.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124948-56206.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124948-43938.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124946-18087.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124948-55778.png)
由
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124948-61454.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124948-79489.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124949-84585.png)
解之,得
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124949-31742.png)
经检验符合题意 7分
故所求函数的解析式为
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124946-51559.png)
(Ⅱ)当
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124945-91659.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124949-27634.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124949-34080.png)
因为
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124945-77369.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124945-84575.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124950-10850.png)
即
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124950-62104.png)
即
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124950-77119.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124946-37595.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124932-26738.png)
(Ⅰ) 求函数
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124933-66978.png)
(Ⅱ) 当
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124933-50368.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124933-66978.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124933-52797.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124910-29376.png)
(1)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124910-88115.png)
(2)若函数
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124910-88115.png)
①对任意的
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124911-50886.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124911-97650.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124911-54650.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124911-87454.png)
②对
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124912-86371.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124912-85396.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124912-85334.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124901-67787.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124902-89057.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124902-15267.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124848-27319.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124848-93691.png)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124848-36983.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124848-90105.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124848-28744.png)
(2)求
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124848-90105.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124849-15886.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124829-55412.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124829-85847.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017124830-80390.png)
A.0 | B.2 | C.0或2 | D.3 |
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