题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032825-91421.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032825-85741.gif)
(1) 求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032825-91421.gif)
(2) 设
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032825-43724.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032826-25026.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032826-75624.gif)
(3)求
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032825-91421.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032826-12945.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032826-73404.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032826-80634.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032827-67038.gif)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032827-49273.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032827-42743.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032827-12608.gif)
故
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032826-12945.gif)
(2)因为
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032828-90563.gif)
若
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032826-75624.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032828-80493.gif)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032828-20252.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032826-73404.gif)
(3)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032826-80634.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032828-74412.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032827-67038.gif)
核心考点
试题【(本题满分12分)已知数列满足(1) 求数列的通项公式;(2) 设,试推断是否存在常数A、B、C,使对一切都有成立?若存在,求出A、B、C的值;若不存在,说】;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/20191013/20191013032810-28884.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032811-68495.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032810-28884.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032811-15927.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032811-36911.gif)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032806-47766.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032806-53865.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032806-30143.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032806-70339.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032807-28378.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032807-42956.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032807-48063.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032807-35299.gif)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032807-35299.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032807-94594.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032759-12783.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032759-30397.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032800-96279.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032800-73804.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032800-40804.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032800-77052.gif)
A.1 | B.2 | C.3 | D.4 |
已知数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032750-54591.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032750-20988.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032750-54875.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032750-21488.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032751-44374.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032751-13230.gif)
(Ⅰ)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032751-22837.gif)
(Ⅱ)设
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032751-39069.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032751-34036.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032752-57435.gif)
已知数列{
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032746-33698.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032746-75421.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013032747-80778.gif)
A.第4项 | B.第5项 | C.第6项 | D.第7项 |
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