题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050416-87641.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050416-44101.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050417-52140.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050417-80623.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050417-12324.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050417-19185.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050416-44101.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050417-56599.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050418-98382.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050418-20624.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050418-89756.png)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050418-25819.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050417-19185.png)
(2)满足
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050418-18383.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050419-30936.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050419-12160.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050419-61870.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050419-11150.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050420-84662.png)
解析
(1)由
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050420-85275.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050420-75553.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050420-36116.png)
又
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050420-91210.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050421-30361.png)
则得
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050421-78418.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050419-11150.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050421-83818.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050421-23050.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050422-26606.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050422-16919.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050422-36886.png)
即
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050422-47052.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050423-76137.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050423-11755.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050423-34694.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050423-20239.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050420-84662.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050406-62607.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050406-71299.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050406-90732.png)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050406-62607.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050406-76098.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050406-64218.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050407-21286.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050407-93811.png)
(3)设
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050407-49128.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050407-94035.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050407-33295.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050408-68728.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050408-84580.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050354-93730.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050354-97217.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050354-25813.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050354-66550.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050354-19018.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050355-81630.png)
(1)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050355-32332.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050355-91026.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050354-93730.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050355-61648.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050355-49386.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050355-96295.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050354-66550.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050355-93049.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050356-63559.png)
(3)设
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050356-37658.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050356-81550.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050356-38103.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050356-18238.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050356-97550.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050357-72274.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050357-71014.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050354-66550.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050336-70916.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050336-58963.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050336-44712.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050337-94116.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050336-58963.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050329-80474.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050329-21362.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050329-36795.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050330-54353.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050330-25651.png)
A.![]() | B.-![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014050313-76276.png)
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