1.A与B的交集:2x-y=0
3x+y=0. x=0,y=0.
A∩B={(x,y)|(0,0)}
2.B与C的交集:3x+y=0
2x-y=3. x=3/5, y=-9/5
B∩C={(x,y)|(3/5,-9/5)}
3.两者的并集:{(x,y)|(0,0)∪(3/5,-9/5)}
1.A与B的交集:2x-y=0
3x+y=0. x=0,y=0.
A∩B={(x,y)|(0,0)}
2.B与C的交集:3x+y=0
2x-y=3. x=3/5, y=-9/5
B∩C={(x,y)|(3/5,-9/5)}
3.两者的并集:{(x,y)|(0,0)∪(3/5,-9/5)}