関連ワード:  what is 1 2 rational or irrational    is 1 2 rational or irrational number    is 6 1 2 rational or irrational    is 3 1 2 rational or irrational    is 5 1 2 rational or irrational    is 4 1 2 rational or irrational    is 1 √ 2 rational or irrational    is 12 1 2 rational or irrational    is 7 1 2 rational or irrational    is negative 1 2 rational or irrational