题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042427-25691.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042427-19969.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042427-40829.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042428-50358.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042428-72260.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042428-49294.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042428-54915.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042428-38773.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042429-22728.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042429-55399.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042429-46512.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042429-66214.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042429-67369.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042428-50358.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042430-47578.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042430-47578.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042430-94372.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042430-59987.gif)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042430-63268.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042430-94372.gif)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042431-30806.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042431-56253.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042431-69979.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042431-22945.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042431-53727.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042432-24024.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042430-59987.gif)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042414-89771.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042414-88754.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042415-19696.gif)
且
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042415-85439.gif)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042415-73167.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042415-55090.gif)
(2)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042414-89771.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042415-43688.gif)
(3)设数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042416-67825.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042416-90314.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042416-96505.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042416-36747.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042416-90314.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042416-96580.gif)
设数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042403-17279.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042404-13609.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042404-71861.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042404-67944.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042404-70906.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042404-48338.gif)
(Ⅰ)设
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042405-45125.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042405-89297.gif)
(Ⅱ)若
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042405-13354.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042404-48338.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042405-46446.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042351-25003.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042351-99061.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042351-51698.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042352-40149.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042352-51256.gif)
A.30 | B.45 | C.90 | D.186 |
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042338-84885.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042339-34764.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042339-59843.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042339-16550.gif)
(Ⅰ)求
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042339-34764.gif)
(Ⅱ)若
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042339-43117.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042340-55650.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042340-26723.gif)
(Ⅲ)若数列{bn}满足
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042340-61617.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042340-29127.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042340-58126.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042341-53011.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042341-24539.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042332-28390.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042332-65016.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042332-11320.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042332-70907.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042333-50704.gif)
(Ⅰ)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042332-28390.gif)
(Ⅱ)设数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042332-28390.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042333-29648.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013042333-29784.gif)
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