1/1997=1/A+1/B(A>B>0),求A/B=?

问题描述:

1/1997=1/A+1/B(A>B>0),求A/B=?

分数的拆分:
1/1997
=1998/(1997×1998)
=(1997+1)/(1997×1998)
=1/1998+1/3990006
A=39990006
B=1998
A/B=1997