当x+y=5xy时,(3x+xy+3y)/x-2xy+y=?
问题描述:
当x+y=5xy时,(3x+xy+3y)/x-2xy+y=?
答
x+y=5xy代入算式
(3x+xy+3y)/(x-2xy+y)
=[3(x+y)+xy]/[(x+y)-2xy]
=(15xy+xy)/(5xy-2xy)
=16/3