题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005854-82905.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005854-93647.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005854-95650.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005855-96997.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005855-11821.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005855-12182.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005855-63468.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005854-93647.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005856-12998.gif)
(Ⅰ)证明:
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005856-50132.gif)
(Ⅱ)若
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005856-92208.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005856-22955.gif)
(Ⅲ)(理科做,文科不做)若
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005856-26018.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005857-48160.gif)
答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005857-87136.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005857-92432.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005857-29033.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005858-89040.gif)
(II)证:
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005858-99238.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005858-71161.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005858-50010.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005858-42220.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005859-17356.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005859-14777.gif)
(III)若
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005856-26018.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005859-89943.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005859-34155.gif)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005859-78180.gif)
①+②得:
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005900-43098.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005900-18432.gif)
核心考点
试题【(本小题满分14分) 已知数列和满足:,,,(),且是以为公比的等比数列.(Ⅰ)证明:;(Ⅱ)若,证明:数列是等比数列;(Ⅲ)(理科做,文科不做)若,求和:.】;主要考察你对等差数列等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005834-61498.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005835-77515.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005835-82289.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005835-82313.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005835-40993.gif)
A.![]() | B.![]() | C.![]() ![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005830-24584.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005830-31283.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005830-31021.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005830-30761.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005831-21116.gif)
A.18 | B.36 | C.45 | D.60 |
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005802-93827.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005802-48379.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005802-28335.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005803-83380.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005803-53871.gif)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005803-43161.gif)
(2)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005802-93827.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005803-52424.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005751-65314.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005751-30685.gif)
(1)求证
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005751-77061.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005751-65314.gif)
(2)已知函数
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005752-77904.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005752-96877.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005752-63834.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005752-46507.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005752-48003.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005753-72907.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005753-54913.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005740-86746.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005740-89738.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013005740-92699.gif)
A.![]() | B.![]() | C.![]() | D.![]() |
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