题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214718-78965.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214719-35906.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214719-97934.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214719-15834.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214719-86366.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214719-34370.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214720-34392.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214720-37499.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214720-62749.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214720-83044.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214721-96672.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214721-62372.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214721-68354.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214721-69639.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214722-20280.gif)
答案
解析
核心考点
举一反三
(本题满分12分)数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214701-62732.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214701-60134.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214702-79363.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214702-72889.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214702-34186.gif)
(Ⅰ)求
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214702-77534.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214703-15285.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214703-52258.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214701-62732.gif)
(Ⅱ)求和
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214703-87270.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214641-59411.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214641-77623.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214641-28350.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214641-90242.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214641-59411.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214642-65404.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214642-54414.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214642-37980.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214642-86490.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214643-90121.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214643-84900.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214643-20196.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214643-16565.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214643-84267.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214631-54288.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214631-55148.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214631-91443.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214632-55636.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214632-43494.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214620-35011.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214621-94820.gif)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214612-22575.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214612-80518.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214613-10270.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214613-17404.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214613-91644.gif)
且
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214613-76121.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012214613-32065.gif)
A.![]() | B.![]() | C.![]() | D.![]() |
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