若分式1/(3-x)的值为整数,则整数x=().已知1/x-1/y=3,则分式(2x+3xy-2y)/(x-2xy-y)=().
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若分式1/(3-x)的值为整数,则整数x=().已知1/x-1/y=3,则分式(2x+3xy-2y)/(x-2xy-y)=().
若分式1/(3-x)的值为整数,则整数x=().
已知1/x-1/y=3,则分式(2x+3xy-2y)/(x-2xy-y)=().
若分式1/(3-x)的值为整数,则整数x=().已知1/x-1/y=3,则分式(2x+3xy-2y)/(x-2xy-y)=().
1/(3-x)
的值为整数
所以3-x=1或3-x=-1
所以x=2或4
1/x-1/y=3
(y-x)/(xy)=3
y-x=3xy
x-y=-3xy
(2x+3xy-2y)/(x-2xy-y)
=[2(x-y)+3xy]/[(x-y)-2xy]
=(-6xy+3xy)/(-3xy-2xy)
=(-3xy)/(-5xy)
=3/5
2或4
3/5
若分式1/(3-x)的值为整数,则3-x=1或-1
整数x=(2或4).
已知1/x-1/y=3,则分式(2x+3xy-2y)/(x-2xy-y)=().
1/x-1/y=(y-x)/xy=3
y-x=3xy
原式=(2(x-y)+3xy)/[(x-y)-2xy]=(2*(-3xy)+3xy)/(-3xy-2xy)=-3xy/(-5xy)=3/5
分式1/(3-x)的值为整数,则整数x=(2、4).
已知1/x-1/y=3,则分式(2x+3xy-2y)/(x-2xy-y)=().
1/x-1/y=3可以推出y-x=3xy或则x-y=-3xy
所以2x+3xy-2y=x-y
x-2xy-y=-3xy
所以(2x+3xy-2y)/(x-2xy-y)=(x-y)/(-3xy)
=1