题目
题型:不详难度:来源:
A.6 | B.7 | C.8 | D.9 |
答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010104211-75152.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010104211-72090.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010104211-21845.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010104212-73244.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010104137-58909.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010104137-36211.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010104137-58909.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010104138-13988.png)
(1)求通项
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010104138-94356.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010104137-36211.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010104138-66922.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010104138-81088.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010104138-13988.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010104139-88855.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010104100-85372.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010104101-32359.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010104101-46191.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010104101-70473.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010104101-77466.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010103859-75448.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010103859-82292.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010103859-83578.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010103859-74926.png)
(1)试用
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010103859-15913.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010103900-47284.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010103900-94407.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010103900-82016.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010103900-14087.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010103900-33097.png)
(3)若
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010103901-74538.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010103901-27585.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010103901-18791.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010103821-30667.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010103822-10251.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010103822-59908.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010103822-19865.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010103822-30785.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010103822-24496.png)
参考:31×32=992,32×33=1056,44×45=1980,45×46=2070,2011×2012=4046132
(1)试问第2012个1为该数列的第几项?
(2)求
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010103823-98921.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010103823-67075.png)
(3)(特保班做)是否存在正整数
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010103823-80940.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010103823-55420.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010103823-80940.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010103747-98250.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010103747-94844.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191010/20191010103747-33144.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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