题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010133010-62506.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010133011-89975.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010133011-99089.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010133011-69801.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010133011-46848.png)
(1)证明:数列
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010133012-87895.png)
(2)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010133010-62506.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010133012-22203.png)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010133012-12813.png)
(1)证明
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010133012-35952.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010133011-99089.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010133011-69801.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010133011-46848.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010133013-51035.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010133013-25495.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010133013-69959.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010133013-43932.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010133013-32116.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010133014-14469.png)
(2)解:由(I)得
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010133014-44454.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010133014-74190.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010133014-73117.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010133015-75231.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010133015-13484.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010133015-43662.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010132808-70548.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010132808-16073.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010132808-76327.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010132801-59876.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010132802-76078.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010132802-80564.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010132802-33063.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010132802-10824.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010132803-13300.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010132803-96764.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010132430-26954.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010132430-85107.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010132430-52711.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010132430-66456.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010132430-26954.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010132430-85107.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010132430-52711.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010132431-96129.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010132431-32681.png)
无解的方程最多有 个
(1)求{an}的公比q;
(2)若a1-a3=3,求
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010132411-18056.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010132411-64934.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010132211-44009.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010132211-39012.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010132211-90960.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010132211-30657.png)
(Ⅰ)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010132211-59494.png)
(Ⅱ)设数列
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010132211-59494.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010132212-15397.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010132212-70147.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010132212-15912.png)
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