题目
题型:不详难度:来源:
已知数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035752-22891.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035752-33583.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035753-84215.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035753-48468.gif)
(Ⅰ)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035753-57189.gif)
(Ⅱ)设
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035753-22059.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035753-37816.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035752-33583.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035754-92848.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035754-35297.gif)
(Ⅱ)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035754-24307.jpg)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035754-86156.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035755-29391.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035755-37801.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035755-16848.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035755-28375.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035755-89234.gif)
(Ⅱ)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035756-82882.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035756-98386.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035756-75452.gif)
两式相减得
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035756-31362.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035757-98528.gif)
核心考点
举一反三
第3小题满分8分.
已知数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035742-42152.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035742-58393.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035742-83410.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035743-40536.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035743-17466.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035743-92292.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035743-11787.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035743-48898.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035744-20935.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035744-73708.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035744-67558.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035744-80684.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035743-92292.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035744-43259.gif)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035745-20879.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035745-11857.gif)
(2)求证:当
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035743-92292.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035745-10550.gif)
(3)已知
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035745-73569.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035746-18651.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035746-48345.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035746-83763.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035746-17802.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035746-84083.gif)
求
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035745-11857.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035735-13269.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035735-50739.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035735-76571.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035735-17879.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035736-31390.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035736-71192.gif)
(文科10分)设0<a,b,c<1,求证:(1-a)b,(1-b)c,(1-c)a不同时大于
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035736-22126.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035730-88792.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035730-58502.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035730-50670.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035730-62944.gif)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035711-24367.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035712-76186.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035712-45463.gif)
(I)求
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035712-92563.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035711-24367.gif)
(II)设
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035712-96392.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035712-79696.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035713-83996.gif)
求使
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035713-19439.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013035706-34597.gif)
A.1 | B.![]() | C.![]() | D.![]() |
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