题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010145135-99885.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010145136-72904.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010145136-51510.png)
(1)证明数列
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010145136-96706.png)
(2)求所有正整数
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010145136-45460.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010145136-96706.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010145136-45460.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010145135-99885.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010145137-76850.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010145137-76499.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010145137-18166.png)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010145136-51510.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010145137-86209.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010145138-25098.png)
数列
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010145135-99885.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010145137-76499.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010145136-96706.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010145136-45460.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010145138-99612.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010145138-35350.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010145138-10117.png)
证明(1)由已知得
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010145139-60137.png)
即
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010145139-60002.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010145139-59338.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010145140-18125.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010145137-76850.png)
(2)易得
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010145140-86392.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010145137-76499.png)
令
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010145140-35514.png)
即
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010145138-10117.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010145140-51220.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010145141-65494.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010145137-18166.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010144603-41183.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010144603-27180.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010144457-11336.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010144457-68853.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010144457-96746.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010144457-50624.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010144458-84515.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010144458-29548.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010144457-96746.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010144458-79652.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010144458-42899.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010144459-78586.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010144459-98275.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010144459-31072.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010144457-96746.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010144458-79652.png)
A.1 | B.2 | C.3 | D.4 |
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010144208-11103.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010144208-51793.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010144208-11103.png)
(II)若数列
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010144208-95115.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010144209-66998.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010144209-38521.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010144209-99620.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010144209-26630.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010144210-47279.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010143721-32241.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010143721-25985.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010143721-93396.png)
1)写出数列
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010143722-13727.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010143722-85577.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010143721-93396.png)
2)求经过多少年后,该项目的资金可以达到或超过
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010143722-23990.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010143646-10356.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010143646-62908.png)
1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010143646-35174.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010143647-97121.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010143647-59697.png)
3)设
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010143647-85007.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010143647-16542.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010143648-96502.png)
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