関連ワード:  is 2 3 a rational number    is 2 3 a rational number or irrational    is 2 3 a rational number justify your answer    is 2 √ 3 a rational number    is 2 over 3 a rational number    is 1 2 3 a rational number    is √ 2 3 a rational number justify your answer    is negative 2 3 a rational number    is 4 2 3 a rational number    is 6 2 3 a rational number