问题描述： 已知x分之1+y分之1=5,则分式x+2xy+y分之2x-3xy+2y的值为快 1个回答 分类：数学 2014-11-17 问题解答： 我来补答 1/x + 1/y = 5(x+y)/x*y = 5x+y = 5*x*yx+2xy+y = x+y + 2xy = 5xy+2xy = 7xy2x-3xy+2y = 10xy-3xy = 7xy(2x-3xy+2y)/(x+2xy+y) = 1 展开全文阅读
