题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014073004-32577.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014073005-31429.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014073005-82925.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014073005-55573.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014073004-32577.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014073005-70804.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014073005-49899.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014073006-85879.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014073006-22162.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014073006-27571.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014073006-99443.png)
解析
试题分析:(1)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014073007-57429.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014073007-83739.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014073007-70604.png)
故
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014073007-83102.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014073007-89059.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014073008-37910.png)
整理得,
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014073008-75248.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014073008-23361.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014073008-43809.png)
点评:本题考查了等比数列通项公式
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014073008-79853.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072952-22307.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072952-89177.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072953-43757.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072953-73987.png)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072953-36754.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072953-91964.png)
(2)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072953-36754.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072954-34371.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072954-51343.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072947-99984.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072947-96073.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072947-97055.png)
A.21 | B.4 | C.84 | D.8 |
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072937-47915.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072937-45410.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072937-83453.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072938-59406.png)
A.5 | B.10 | C.15 | D.20 |
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072932-25873.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072932-50049.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072932-13175.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072932-54249.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072933-73366.png)
A.256 | B.510 | C.512 | D.1024 |
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072924-79032.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072924-73017.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072924-66783.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072925-45561.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072924-79032.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072925-45561.png)
A.4018 | B.4017 | C.2009 | D.2010 |
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