а)
A = [3,7]
B = R
AB = [(3,R); (7,R)]
б)
A = [1,3,7]
B = [1,3]
AB = [(1,1);(1,3);(3,1);(3,3);(7,1);(7,3)]
а)
A = [3,7]
B = R
AB = [(3,R); (7,R)]
б)
A = [1,3,7]
B = [1,3]
AB = [(1,1);(1,3);(3,1);(3,3);(7,1);(7,3)]