题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013933-46817.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013934-89020.png)
A.![]() | B.![]() | C.![]() | D.-1 |
答案
解析
试题分析:由题意设新等差数列为
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013935-59298.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013935-38700.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013935-58512.png)
点评:对于此类问题主要弄清等差数列项的特点,然后结合等差数列的性质进行求解
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013914-94576.png)
甲:数列{an}是等方比数列;乙:数列{an}是等比数列,则甲是乙的 条件.(在“充分不必要”、“必要不充分”、“充要”、“既不充分也不必要”选择一个填入)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013903-57384.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013903-25985.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013903-85084.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013903-14138.png)
(Ⅰ)求常数p的值;
(Ⅱ)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013903-25985.png)
(Ⅲ)记
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013904-58628.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013903-85084.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013904-16713.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013904-66849.png)
在数列
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013832-76614.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013832-19334.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013832-57067.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013833-41171.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013833-72956.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013833-68369.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013834-53492.png)
(2)猜想
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013832-76614.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013813-41562.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013814-89984.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013814-18720.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013814-21229.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013814-51516.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013814-89984.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013815-84817.png)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013815-56624.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013815-74687.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013815-89808.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013815-97277.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013816-53631.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013815-89808.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013814-18720.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013814-89984.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013813-41562.png)
(3)是否存在这样的正数
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013814-18720.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013814-89984.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013814-18720.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013531-88608.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013532-25196.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013532-61320.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013532-84690.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013531-88608.png)
(2)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013533-91825.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013532-25196.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010013533-27042.png)
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