题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045946-92085.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045946-68730.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045947-80295.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045947-12104.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045947-12196.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045947-73494.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045948-70446.png)
解析
试题分析:
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045947-80295.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045947-12104.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045948-30235.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045948-92359.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045948-97297.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045948-49914.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045949-90986.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045949-12133.png)
又
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045949-43869.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045949-86524.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045950-31972.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045950-49926.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045947-73494.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045950-67110.png)
点评:数列的递推关系式也是表示数列的一种方式,递推公式也是高考中常考的内容,要灵活应用.
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045933-55969.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045933-38972.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045933-73853.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045933-36856.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045934-10352.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045934-47211.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045934-47211.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045934-10352.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045915-58257.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045926-45815.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045926-41631.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045727-46141.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045727-12544.png)
(1)求通项公式
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045727-23773.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045728-41153.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045728-59922.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045728-54764.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045728-98592.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045644-64168.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045644-38245.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045644-21845.png)
已知数列{
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045636-35762.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045636-99131.png)
(I)写出
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045637-75511.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010045636-35762.png)
(II)用数学归纳法证明所得的结论。
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