题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020947-35514.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020947-98178.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020947-80854.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020947-37585.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020948-48179.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020948-41920.png)
A.![]() | B.![]() | C.![]() | D.![]() |
答案
解析
试题分析:设
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020949-53151.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020949-98807.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020949-19996.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020949-12960.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020950-84964.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020950-16013.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020930-61536.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020930-80899.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020930-61668.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020930-59528.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020931-22737.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020930-61536.png)
①递减数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020930-61536.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020930-61536.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020930-61536.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020930-61536.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020930-61536.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020919-17178.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020919-79956.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020919-83753.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020919-29009.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020925-42079.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020925-98691.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020911-33534.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020911-92717.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020912-71102.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020912-47333.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020912-32601.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020912-41706.png)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020911-33534.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020912-62215.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020913-65961.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020911-92717.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020913-29582.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020856-34242.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020857-47444.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020844-25601.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020844-33533.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020844-91406.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020844-25601.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020844-59209.png)
(Ⅰ)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020844-25601.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020845-34730.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020844-91406.png)
(II)设
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020845-51482.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020845-91395.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020845-16273.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020844-59209.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012020845-29733.png)
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