题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040549-10713.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040550-44367.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040550-74617.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040550-30872.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040550-24276.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040551-20957.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040551-59117.png)
(Ⅰ)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040549-10713.png)
(Ⅱ)若
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040551-50558.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040551-24233.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040557-59239.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040550-44367.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040551-24233.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040557-73845.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040557-42841.png)
解析
试题分析:(1)由
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040558-73689.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040558-20976.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040558-45695.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040558-58888.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040559-10468.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040559-48674.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040559-79795.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040559-62082.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040558-73689.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040600-89429.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040600-52655.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040549-10713.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040559-10468.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040600-63610.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040557-73845.png)
(2)数列
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040550-24276.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040600-83412.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040601-34348.png)
从而
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040601-31463.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040601-46942.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040601-98304.png)
从而
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040602-50893.png)
点评:由
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040550-74617.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040602-26913.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040446-21238.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040446-57219.png)
A.15 | B.30 | C.31 | D.64 |
A.33 | B.72 | C.84 | D.189 |
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040354-97596.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040354-49147.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040354-95317.png)
A.–4 | B.–6 | C.–8 | D.–10 |
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040224-58305.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040224-20895.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040225-66841.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040225-52202.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040225-52842.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010040225-89243.png)
A.90 | B.9! | C.1022 | D.1024 |
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