题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082424-39061.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082424-50066.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082424-66385.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082425-39129.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082425-76650.png)
答案
解析
试题分析:因为数列
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082425-89475.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082425-41391.png)
又
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082425-39129.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082425-99406.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082426-12379.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082426-97278.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082424-66385.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082404-45833.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082404-74173.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082405-66376.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082405-69248.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082405-14687.png)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082406-28639.png)
(2)设数列
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082406-28639.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082406-32408.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082406-99653.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082406-75501.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082406-32408.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082407-55004.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082407-55004.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082313-35930.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082313-24770.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082313-35930.png)
A.180 | B.405 | C.450 | D.810 |
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082245-82054.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082245-57866.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082246-55842.png)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082245-82054.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082246-61060.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082246-95644.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082246-73364.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082246-73364.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082247-87737.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082247-43218.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082213-98098.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082213-82791.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082213-99654.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082213-37223.png)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082213-98098.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082213-57016.png)
(2)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082213-98098.png)
(3)设
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082214-86014.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082214-22497.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082214-62818.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082213-82791.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082214-41761.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082215-26963.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082215-86750.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082145-78988.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082145-28253.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082146-73896.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082146-26024.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082146-21280.png)
(I)求
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082145-78988.png)
(II)设
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082146-61448.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082146-25360.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082147-19406.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009082147-78512.png)
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