题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010062345-49622.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010062345-21552.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010062345-44377.png)
A.–4 | B.–6 | C.–8 | D.–10 |
答案
解析
因为等差数列
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010062345-49622.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010062345-21552.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010062346-44122.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010062345-44377.png)
解决该试题的关键是运用
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010062346-44486.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010062202-91908.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010062203-14883.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010062203-23867.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010062203-85853.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010062137-91963.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010062138-10814.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010062138-53532.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010062138-97270.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010062139-80049.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010062139-83533.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010062139-77187.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010062139-55772.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010062138-10814.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010062140-37041.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010062140-64825.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010062140-14330.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010061930-75727.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010061930-52488.png)
已知函数
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010061846-13580.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010061847-84163.png)
(1)求该函数的解析式;
(2)数列
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010061847-82587.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010061848-38428.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010061848-44376.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010061847-82587.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010061848-96984.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010061848-56210.png)
证明数列
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010061849-30524.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010061847-82587.png)
(3)另有一新数列
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010061849-33166.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010061849-33166.png)
如下数表:
![]() |
![]() ![]() |
![]() ![]() ![]() |
![]() ![]() ![]() ![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010061852-92105.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010061847-82587.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010061852-89766.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010061903-93579.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010061807-30073.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010061807-15088.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010061813-74134.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010061813-65481.png)
A.1 | B.![]() | C.- 2 | D.3 |
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