题目
题型:不详难度:来源:
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![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014647-73418.gif)
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![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014648-82176.gif)
(1) 求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014646-33748.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014646-87191.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014648-23266.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014646-71316.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014648-47172.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014648-47172.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014649-37507.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014646-71316.gif)
答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014649-56653.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014649-14892.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014649-95315.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014649-49319.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014650-62949.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014650-46521.gif)
又数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014650-35074.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014650-26938.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014651-59625.gif)
又公比
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014651-89394.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014651-71151.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014651-97223.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014651-65074.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014652-69504.gif)
又
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014652-99377.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014652-85516.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014652-54390.gif)
数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014653-33125.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014653-56832.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014653-63470.gif)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014648-82176.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014653-20317.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014653-96121.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014651-97223.gif)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014654-19189.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014654-83736.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014654-10056.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014654-69179.gif)
由
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014655-84599.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014655-82233.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014655-82445.gif)
核心考点
试题【(本题满分12分)已知点(1,)是函数且)的图象上一点,等比数列的前项和为,数列的首项为,且前项和满足-=+().(1) 求数列和的通项公式;(2)若数列{前】;主要考察你对等差数列等知识点的理解。[详细]
举一反三
在数列{an}中,a1=1,当n≥2时,an,Sn,Sn-
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014634-25782.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014634-34443.gif)
(1)求a2,a3,a4,并推出an的表达式;
(2)用数学归纳法证明所得的结论;
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014626-31618.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014626-24275.gif)
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![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013014538-18041.gif)
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