give a counterexample for each of the two

directions of:

The product xy of a rational number x and a real number y is irrational if

and only if y is irrational.

cant figure out the first direction

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- October 4th 2010, 04:08 PMmremwoPROOF by counterexample
give a counterexample for each of the two

directions of:

The product xy of a rational number x and a real number y is irrational if

and only if y is irrational.

cant figure out the first direction