[数论] A的各位数字之和

[Copy link]

83 Threads	434 Posts	12 Reputation

tommywong posted 2014-4-18 11:20 |Read mode

sq.k12.com.cn/discuz/thread-703868-1-1.html

$A=\underbrace{11...11}_{k个}\times\underbrace{11...11}_{k个}$

求A的各位数字之和（$9[k-k(rem9)]+[k(rem9)]^2$）

现充已死，エロ当立。
维基用户页：https://zh.wikipedia.org/wiki/User:Tttfffkkk
Notable algebra methods：https://artofproblemsolving.com/community/c728438
《方幂和及其推广和式》数学学习与研究2016.

Reply Edit

Quick Reply

2025-6-8 06:45 GMT+8

Powered by Discuz!

Processed in 0.015282 second(s), 21 queries

Account		Remember me	Forgot password?
Password			Register account