已知1/X-1/Y=3,求:3X-2XY-3Y/X-2XY-Y的值
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![已知1/X-1/Y=3,求:3X-2XY-3Y/X-2XY-Y的值](/uploads/image/z/5234682-66-2.jpg?t=%E5%B7%B2%E7%9F%A51%2FX-1%2FY%3D3%2C%E6%B1%82%3A3X-2XY-3Y%2FX-2XY-Y%E7%9A%84%E5%80%BC)
已知1/X-1/Y=3,求:3X-2XY-3Y/X-2XY-Y的值
已知1/X-1/Y=3,求:3X-2XY-3Y/X-2XY-Y的值
已知1/X-1/Y=3,求:3X-2XY-3Y/X-2XY-Y的值
1/X-1/Y=3
y-x=3xy
x-y=-3xy
3X-2XY-3Y/X-2XY-Y
=[(3x-3y)-2xy]/[(x-y)-2xy]
=(-9xy-2xy)/(-3xy-2xy)
=-11xy/(-5xy)
=11/5