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If $x$ and $y$ are real numbers on the interval:

$$ 0 < x < 1 < y $$

...then which of the following is FALSE for all $x$ and $y$ in this interval?

$ { x }^{ 2 }$ $< xy $

$ xy<$ $y^{ 2 } $

$ \cfrac { 1 }{ x } <\cfrac { 1 }{ y } $

$ \cfrac { y }{ x } >1 $

$ y-x>0 $