Possible Duplicate:
$a^{1/2}$ is either an integer or an irrational number.
Will every $n^{th}$ root of $2$ be an irrational number? If yes, how can I prove that?
Possible Duplicate:
$a^{1/2}$ is either an integer or an irrational number.
Will every $n^{th}$ root of $2$ be an irrational number? If yes, how can I prove that?