题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075418-11431.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075418-36233.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075419-96211.png)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075418-11431.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075419-83771.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075419-12587.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075419-84346.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075420-13338.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075420-92193.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075419-84346.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075420-69109.png)
解析
试题分析:(1)先用等比数列的性质化简
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075419-96211.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075420-21530.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075421-11260.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075421-25566.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075421-28339.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075421-24978.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075419-84346.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075421-97827.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075422-61509.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075419-12587.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075419-84346.png)
试题解析:(1)设等比数列
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075418-11431.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075422-50877.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075419-96211.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075422-65421.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075423-74318.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075423-30803.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075423-10677.png)
由
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075418-36233.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075421-25566.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075423-81841.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075424-30111.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075418-11431.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075420-13338.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075424-87269.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075424-38416.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075424-45760.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075424-30111.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075420-92193.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075419-84346.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075420-69109.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075419-84346.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075406-70831.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075406-62041.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075406-46972.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075407-72553.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075207-44805.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075207-23868.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075207-62543.png)
A.58 | B.88 | C.143 | D.176 |
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075142-68120.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075142-27217.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075142-45125.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075143-95505.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075143-90413.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075143-55177.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075143-83259.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075113-21463.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075113-89401.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075113-21463.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075114-48638.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075113-21463.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075114-48638.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075113-21463.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075114-10977.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075114-10977.png)
(1)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075114-96578.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075114-79623.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075114-10977.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075114-48638.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075113-21463.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075114-48638.png)
①数列
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075113-21463.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075114-16157.png)
②数列1,2,3,4,5;
③数列1,2,3,… 11.
其中具有“
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075114-48638.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009075114-48638.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009074941-15425.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009074941-98926.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009074942-48717.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009074942-66854.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009074942-98068.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009074942-20540.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009074942-75857.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009074943-55128.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009074943-77432.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009074943-19499.png)
(2)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009074943-13296.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009074942-48717.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191009/20191009074944-91235.png)
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