а) AxB = {(1,4), (1,6), (1,8), (3,4), (3,6), (3,8)}
б) AxB = {(-3, x) | x∈R} ∪ {(0, x) | x∈R} ∪ {(1, x) | x∈R} ∪ {(2, x) | x∈R}
а) AxB = {(1,4), (1,6), (1,8), (3,4), (3,6), (3,8)}
б) AxB = {(-3, x) | x∈R} ∪ {(0, x) | x∈R} ∪ {(1, x) | x∈R} ∪ {(2, x) | x∈R}