题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054706-41073.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054706-80931.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054706-16773.gif)
(2)若数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054706-53990.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054706-30503.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054708-21896.gif)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054708-71932.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054708-12386.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054708-77320.gif)
即
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054708-50184.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054709-24050.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054709-84386.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054709-47531.gif)
(2)由(1)得,
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054709-26799.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054709-75343.gif)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054649-89650.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054649-48258.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054650-65294.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054650-10450.jpg)
A.![]() | B.![]() |
C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054639-37789.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054639-63528.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054640-13320.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054640-80003.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054640-19876.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054639-37789.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054640-19876.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054640-46752.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054641-98201.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054641-67717.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054641-11550.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054632-55962.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054632-97558.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054632-95402.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054632-26151.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054608-16754.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054609-69744.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054609-24176.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054609-38245.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054609-33384.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054610-42343.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054610-52214.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054554-24434.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054554-93618.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054554-14561.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054554-72180.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054554-58412.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054555-50379.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054555-50379.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054555-90005.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054554-93618.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054555-51744.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054555-46125.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054555-96079.gif)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054556-94179.gif)
(2)记
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054556-25235.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054556-39395.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054556-35103.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054557-39080.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054557-39080.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054557-95539.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054557-57396.gif)
(3)记
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054557-91174.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054557-31373.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054556-35103.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054558-53292.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054558-54937.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054558-21651.gif)
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