题目
题型:解答题难度:一般来源:不详
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002835-76049.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002835-61840.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002835-38768.png)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002836-24435.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002836-76981.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002836-37671.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002836-64779.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002836-97853.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002835-76049.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002837-81806.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002837-78250.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002837-55489.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002837-79611.png)
解析
试题分析:本题考查数列与函数的综合知识.第一问,将
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002837-15434.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002838-83766.png)
试题解析:(1)当
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002838-60416.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002838-93910.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002838-99720.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002839-79204.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002839-22621.png)
故
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002839-22109.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002836-24435.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002839-78914.png)
(2)①当
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002839-17326.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002840-43188.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002840-67030.png)
同理可得,当
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002840-22144.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002840-21712.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002840-69583.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002840-28932.png)
②当
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002841-12821.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002840-43188.png)
③当
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002841-29988.png)
综上得:当
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002841-31228.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002840-21712.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002841-78870.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002840-28932.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002833-20809.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002833-72181.png)
A.-1 | B.1 | C.-2 | D.2 |
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002831-55004.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002829-85774.png)
①若函数f(x)的值域为R,求实数m的取值范围;
②若函数f(x)在区间(-∞,1-
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002829-50818.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002824-87661.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002824-64846.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002824-54097.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002825-43588.png)
考查下列结论:①
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002825-30726.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002824-87661.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002825-27344.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002825-92948.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002820-95763.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002821-78410.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002821-54039.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818002821-51625.png)
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