1、当1/x-1/y=5时,求分式(3x+5xy-3y)÷(x-3xy-y)的值._数学解答

1、当1/x-1/y=5时,求分式(3x+5xy-3y)÷(x-3xy-y)的值.

人气：236 ℃　时间：2019-08-28 08:06:01

解答

1/x-1/y=5
y-x=5xy
(3x+5xy-3y)÷(x-3xy-y)
=(-15xy+5xy)/(-5xy-3xy)
=-10xy/(-8xy)
=5/4