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2x>3y>5z 3y>5z>2x 3y>2x>5z 2x>5z>3y
y=2x+2 y=2x﹣5 y=2x+1 y=2x﹣1
y=3x2+2x﹣5 y=3x2+2x﹣4 y=3x2+2x+3 y=3x2+2x+4
y=﹣2x2+8x+3 y=﹣2x‑2﹣8x+3 y=﹣2x2+8x﹣5 y=﹣2x‑2﹣8x+2
2x+y﹣8=0 3x﹣2y+1=0 x+2y﹣5=0 3x+2y﹣7=0
2x<3y<5z 5z<2x<3y 3y<5z<2x 3y<2x<5z
x-y-2=0或5x+4y-1=0 x-y-2=0 x-y+2=0 x-y-2=0或4x+5y+1=0
2x+3y﹣8=0 3x﹣2y+1=0 x+2y﹣5=0 3x+2y﹣7=0
2x<3y<5z 3y<2x<5z 5z<3y<2x 5z<2x<3y
y=-2x2-x+3 y=-2x2+4x+5 y=-2x2+4x+8 y=-2x2+4x+6
={0,1,2}, ={y|y=2x,x∈A.},则A.∪B.中的元素个数为( ) A.6B.5 4 3
y=3x-1 y=-3x+5 y=3x+5 y=2x