题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014065827-79752.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014065827-88672.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014065827-80500.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014065827-79752.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014065828-57317.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014065828-49443.png)
解析
试题分析:因为
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014065828-58333.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014065827-88672.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014065828-98346.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014065829-22006.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014065829-47951.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014065829-54239.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014065829-33872.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014065818-87523.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014065819-95073.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014065819-99485.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014065819-94208.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014065809-68962.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014065809-62556.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014065809-68962.png)
(2)证明:
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014065809-71637.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014065756-49237.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014065756-98733.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014065756-49237.png)
(2)求和
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014065756-56220.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014065746-38064.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014065747-96836.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014065747-49653.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014065747-82203.png)
A.12 | B.10 | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014065741-14915.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014065741-84800.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014065741-21007.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014065741-14915.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014065742-65342.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014065742-16940.png)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014065741-14915.png)
(2)求
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014065742-16940.png)
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