题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040644-60352.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040644-81170.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040644-55260.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040644-78123.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040645-25021.png)
(1)试判断数列
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040645-71561.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040644-60352.png)
(2)记
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040645-98049.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040645-71561.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040644-55260.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040645-24464.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040646-12277.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040646-34883.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040646-49546.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040646-60405.png)
解析
试题分析:解:根据题意,
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040647-74796.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040647-14429.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040647-69524.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040647-71385.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040646-12277.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040646-12277.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040648-11581.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040646-34883.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040648-24135.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040648-46851.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040648-12334.png)
令
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040648-23484.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040649-10063.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040649-97831.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040649-75298.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040649-30055.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040646-49546.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040646-60405.png)
点评:主要是考查了等比数列的定义,以及数列的函数性质的运用,属于中档题。
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040637-34186.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040637-65513.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040638-97518.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040638-37047.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040637-65513.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040638-89712.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040638-37047.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040624-99533.png)
A.4 | B.11 | C.10 | D.8 |
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040617-88086.png)
(1)求通项公式an ;(2)令
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040618-48446.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040610-80472.png)
(1)第
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040610-27702.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040610-27702.png)
(2)表中的递推关系类似杨辉三角,则第
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040610-27702.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040611-76458.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040611-57191.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040603-83854.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040603-67577.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040603-32037.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040603-24874.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015040603-36184.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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