题目
题型:不详难度:来源:
已知
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063335-58263.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063335-84583.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063335-85694.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063336-39239.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063336-92548.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063336-10662.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063336-78774.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063336-16088.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063337-93433.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063337-10644.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063337-22284.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063337-38778.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063338-17433.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063336-39239.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063337-10644.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063338-76063.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063338-69768.gif)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063335-84583.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063338-21864.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063338-77991.gif)
化简得:
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063339-70465.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063339-64117.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063337-10644.gif)
(II)由题设得
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063339-98246.gif)
即
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063339-96252.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063339-77252.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063337-38778.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063340-93504.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063338-76063.gif)
(III)由题设得
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063340-89763.gif)
令
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063340-37371.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063340-74134.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063341-78692.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063341-72794.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063341-21663.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063341-63695.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063341-20469.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063338-69768.gif)
核心考点
试题【(本题满分14分)已知为三点所在直线外一点,且.数列,满足,,且().(Ⅰ) 求;(Ⅱ) 令,求数列的通项公式;(III) 当时,求数列的通项公式.】;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/20191013/20191013063330-35118.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063330-35118.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063318-45355.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063319-16509.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063319-81783.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063319-49005.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063320-14104.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063320-20556.jpg)
A.4 | B.5 | C.6 | D.7 |
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063248-51046.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063249-82101.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063249-16308.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063249-92672.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063249-73191.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063250-49198.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063250-72580.gif)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063250-70614.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063249-92672.gif)
(2)试写出
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063250-49612.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063249-92672.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063250-49612.gif)
(3)续写已知数列,使得
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063251-86319.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063251-92579.gif)
设
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063238-95845.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063238-90503.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013063238-22160.gif)
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