题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003242-50574.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003242-43442.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003243-16773.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003242-43442.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003243-14590.png)
A.90 | B.100 | C.145 | D.190 |
答案
解析
试题分析:设等差数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003249-38606.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003249-64687.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003250-88382.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003250-42419.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003250-10500.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003250-59198.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003251-75328.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003251-22531.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003251-81658.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003251-78397.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003251-23213.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003252-49881.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003236-22779.png)
则第
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003237-59440.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003223-45500.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003224-60083.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003224-35237.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003158-80288.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003158-38130.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003158-80288.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003158-15061.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003158-46151.png)
(Ⅰ)求
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003209-50744.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003158-46151.png)
(Ⅱ)令
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003210-54234.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003210-69407.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003158-15061.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003210-28285.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003153-71451.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003153-60243.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003153-37510.png)
A.1 | B.2 | C.![]() | D.4 |
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003130-23178.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003130-48328.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003131-42358.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003131-66090.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003131-98199.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003131-37948.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003131-42358.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003132-20980.png)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003130-48328.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003131-37948.png)
(2)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003132-30210.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003131-42358.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012003132-68247.png)
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