1)a = 3: 5(3+7) = 50a = 2: 5(2+7) = 45a = 0: 5(0+7) = 35
2)× = 1: (21-1)3 = 3× = 5: (25-1)3 = 27× = 10: (210-1)3 = 57
1)
a = 3: 5(3+7) = 50
a = 2: 5(2+7) = 45
a = 0: 5(0+7) = 35
2)
× = 1: (21-1)3 = 3
× = 5: (25-1)3 = 27
× = 10: (210-1)3 = 57