题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054747-92667.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054747-64194.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054747-42310.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054747-48324.gif)
(III)记
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054747-50195.gif)
求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054748-70394.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054748-50692.gif)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054748-99970.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054748-41793.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054748-89667.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054749-12927.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054749-11164.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054749-98414.gif)
(Ⅱ)证明:
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054749-10924.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054749-78549.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054750-72543.gif)
构造辅助函数
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054750-91452.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054750-74562.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054750-69486.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054751-24363.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054751-89687.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054751-12389.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054751-14920.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054751-83308.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054752-57382.gif)
(III)证明:
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054752-56461.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054752-87345.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054752-15502.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054752-76903.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054753-75616.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054753-73226.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054753-69570.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054753-39811.gif)
另一方面,当
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054754-15536.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054754-17895.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054754-80006.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054754-75930.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054754-58587.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054755-79976.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054755-17724.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054755-48254.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054755-82904.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054756-18889.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054756-46669.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054756-83828.gif)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054714-70060.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054714-69010.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054714-65607.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054715-16222.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054715-12608.gif)
(Ⅰ)写出
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054714-65607.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054715-71484.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054715-27374.gif)
(Ⅱ)求
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054714-65607.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054714-69010.gif)
(Ⅲ)设
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054715-64799.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054716-15860.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054714-69010.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054716-32569.gif)
![](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)
![](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)
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