题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009013118-42716.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009013119-57358.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009013119-54064.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009013119-22750.png)
答案
解析
试题分析:因为
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009013119-54064.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009013119-42122.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009013119-88463.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009013120-80222.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009013119-57358.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009013120-13265.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009013120-17678.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009013120-38836.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009013121-89248.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009013121-91606.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009013014-81986.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009013014-98589.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009013014-28915.png)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009013014-81986.png)
(2)若数列
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009013014-81986.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009013015-30535.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009013015-39704.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009013015-30535.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009013001-69747.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009013001-19668.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009013001-43619.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009013002-87480.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009013002-66483.png)
(1)求数列{an}的通项公式;
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009013002-91914.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009013002-99487.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009013002-87529.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009013003-54704.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009012751-73129.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009012751-66905.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009012752-35190.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009012752-16625.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009012752-55850.png)
A.
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009012752-24110.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009012753-60390.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009012753-39602.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009012732-84238.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009012732-88943.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009012732-71824.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009012733-15205.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009012733-45599.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009012733-19117.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009012650-86190.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009012650-97859.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009012650-21452.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009012656-17714.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009012656-71813.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009012656-79915.png)
(1)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009012657-76016.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009012656-17714.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009012657-79267.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009012657-27750.png)
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