题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022246-20778.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022246-61545.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022247-83096.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022247-74248.png)
(Ⅰ)求
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022246-20778.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022247-68130.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022247-19841.png)
(Ⅱ)已知
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022248-60623.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022248-68942.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022247-68130.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022248-62399.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022248-40693.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022248-59788.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022249-76594.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022249-73333.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022249-78214.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022249-77698.png)
解析
试题分析:(Ⅰ)求
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022246-20778.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022247-68130.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022247-19841.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022246-61545.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022247-83096.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022247-74248.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022246-20778.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022246-61545.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022249-19246.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022247-68130.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022248-59788.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022248-60623.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022248-68942.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022247-68130.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022248-62399.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022248-40693.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022250-60356.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022250-50930.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022250-74693.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022249-77698.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022249-76594.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022250-10403.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022247-68130.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022250-41087.png)
试题解析:(Ⅰ)因为
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022247-83096.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022246-61545.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022251-48360.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022251-19644.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022249-73333.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022257-78811.png)
(Ⅱ)设等差数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022250-60356.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022250-50930.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022257-14119.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022257-44228.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022257-79439.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022257-21143.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022258-89735.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022249-77698.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022258-43427.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022258-24351.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022258-10514.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022247-68130.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022237-47217.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022237-66077.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022238-71545.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022238-33372.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022238-66074.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022210-15468.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022211-78056.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022211-27716.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022211-44627.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022211-48208.png)
A.![]() | B.![]() | C.2 | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022202-64312.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022202-26040.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022203-65571.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022203-25496.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022136-89048.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022136-62311.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022137-30710.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022137-41914.png)
(Ⅰ)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022136-89048.png)
(Ⅱ)记
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022137-27886.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022137-91541.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022136-62311.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022143-24366.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022111-92571.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022111-37912.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022112-86534.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022112-55190.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022112-36634.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022111-92571.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191012/20191012022112-64420.png)
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