已知1/5与分式B/A的和是a-15/5a,试求分式B/A

问题描述:

已知1/5与分式B/A的和是a-15/5a,试求分式B/A

B/A=(a-15)/5a-1/5
=(a-15)/5a-a/5a
=-15/5a
=-3/a