関連ワード:  is root 3 1 a rational number    is square root 1 3 a rational number    is 1/root 3 a rational number    2 root 3 1 is an irrational number    show that 3 root 5 1 is not a rational number    is root 1 a rational number    is root 3 is a rational number    is 3/1 a rational number    is 3 root 18 a rational number