题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054554-24434.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054554-93618.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054554-14561.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054554-72180.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054554-58412.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054555-50379.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054555-50379.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054555-90005.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054554-93618.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054555-51744.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054555-46125.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054555-96079.gif)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054556-94179.gif)
(2)记
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054556-25235.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054556-39395.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054556-35103.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054557-39080.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054557-39080.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054557-95539.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054557-57396.gif)
(3)记
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054557-91174.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054557-31373.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054556-35103.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054558-53292.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054558-54937.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054558-21651.gif)
答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054555-50379.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054558-84494.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054558-53147.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054559-64103.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054559-24705.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054559-80971.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054559-87694.gif)
......4分
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054600-17106.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054600-80429.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054600-77951.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054600-31541.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054559-24705.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054600-74048.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054601-82513.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054601-93721.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054601-32460.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054601-32892.gif)
(3)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054601-83726.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054602-74205.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054559-24705.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054602-69017.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054602-79806.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054602-68384.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054603-84253.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054603-19201.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054603-93488.gif)
另一方面,当
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054603-23333.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054603-14741.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054604-50884.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054604-14507.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054604-36114.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054604-94177.gif)
又
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054605-59445.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054605-47766.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054605-78671.gif)
对任意的
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054605-12593.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054558-54937.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054558-21651.gif)
核心考点
试题【已知曲线,从上的点作轴的垂线,交于点,再从点作轴的垂线,交于点,设(1)求数列的通项公式;(2)记,数列的前项和为,试比较与的大小;(3)记,数列的前项和为,试】;主要考察你对等差数列等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054545-23907.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054545-16413.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054546-92323.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054546-71185.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054546-20813.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054546-15642.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054546-69038.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054547-22848.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054547-18226.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054529-31098.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054529-45020.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054529-27964.gif)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054530-93617.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054530-67876.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054530-40407.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054530-21171.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054530-60878.gif)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054531-24953.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054531-13665.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054531-46094.gif)
A.15 | B.1![]() | C.17 | D.18 |
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054504-18257.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054504-25487.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054505-40534.gif)
A.3 | B.4 | C.6 | D.12 |
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054457-96536.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054457-82394.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054458-58138.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054458-29059.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013054458-81964.gif)
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