関連ワード:  1/√2 is rational or irrational    1 2 is rational or irrational    1 2 is rational or irrational answer    1 root 2 is rational or irrational    3 1 2 is rational or irrational    1 root 2 is rational or irrational prove    6 1 2 is rational or irrational    1 2 pi is rational or irrational    1 ⁄ 2 is rational or irrational    1 5 2 is rational or irrational