Question

已知b分之a等于d分之c等于f分之e等于5分之3,且b＋d+f 不等于0求b+d+f分之a+c＋e值

Answer 1

因为a/b=c/d=e/f=3/5 所以a=3b/5,c=3d/5,e=3f/5 代入原式,得(3b/5+3d/5+3f/5)/(b+d+f)=3/5*(b+d+f)/(b+d+f)=3/5