Let A and B be two sets such that n(A) = 3 and n(B) = 2. If (x, 1), (y, 2), (z, 1) are A×B, write A and B.
Let A={x:x∈R,|x|<1}; B={x:x∈R,|x−1|≥1} and
A∪B=R−D, then the set D is