题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053826-40305.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053826-65956.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053827-94998.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053827-16367.png)
答案
解析
试题分析:因为
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053827-83084.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053827-84290.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053827-10090.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053828-95797.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053828-80252.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053828-85728.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053828-25414.png)
点评:由数列的递推关系式求数列的通项公式,有累加、累乘、构造新数列等几种方法,应该明白其各自适用的类型并能熟练应用.
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053608-47156.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053609-29964.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053608-47156.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053609-72805.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053609-85973.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053609-68220.png)
(I)求证:数列
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053609-34822.png)
(II)设
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053610-77885.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053610-99434.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053609-72805.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053610-83080.png)
(III)是否存在自然数
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053610-23700.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053610-41065.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053611-83278.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053610-23700.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053458-39139.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053458-86717.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053458-81886.png)
A.15 | B.45 | C.75 | D.105 |
已知函数f(x)=
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053433-36999.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053434-18941.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053434-47911.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053434-89459.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053434-37688.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053434-76309.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053435-25533.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053435-98114.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053434-47911.png)
(2)记
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053435-49160.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053435-24351.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053436-85731.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053425-21330.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053426-18330.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053426-98925.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053425-21330.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053426-16991.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053426-78568.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053357-92217.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053357-53780.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053357-89423.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053357-92217.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053357-94893.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053358-20280.png)
(2)令
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053358-29524.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053358-36438.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053359-22063.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010053359-46691.png)
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