[問題]誰知道正統解法?

[ZHIHANG (小豬)]

ab=gcd(a,b)*lcm(a,b).
the proof of this theorem
who know?
please tell me thx!!

--
※ 發信站: 批踢踢實業坊(ptt.cc) 
◆ From: 61.231.184.16
→ ZHIHANG:另外提一下我想到的方法是用min and max