已知1/x-1/y=3则分式(2x-3xy-2y)/(x-2xy-y)的值为

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/26 05:27:16
已知1/x-1/y=3则分式(2x-3xy-2y)/(x-2xy-y)的值为
x){}K +t +mv|tOQqEQFY|Vӆ=OvI*'W~ E5A\1mOvx{iE%XRʮЭՅq6 Tjc!l|,DVC (1QC"l 7/.H̳yZ

已知1/x-1/y=3则分式(2x-3xy-2y)/(x-2xy-y)的值为
已知1/x-1/y=3则分式(2x-3xy-2y)/(x-2xy-y)的值为

已知1/x-1/y=3则分式(2x-3xy-2y)/(x-2xy-y)的值为
1/x-1/y=3
同时乘以xy
y-x=3xy
x-y=-3xy
(2x-3xy-2y)/(x-2xy-y)
=[2(x-y)-3xy]/[(x-y)-2xy]
=(-6xy-3xy)/(-3xy-2xy)
=(-9xy)/(-5xy)
=9/5