Question

Let A and B be two sets. show that the set A×B and B×A have an element in common if the sets A and B have an element in common .​

Answer 1

it is u answer...................

Answer 2

Answer:

B

Step-by-step explanation:

× (B ∪ A) } = n { (A ∩ B) } × n{ (A ∩ B) } Hence A × B and B × A have an element in common . The number of elements is k² provided that k is the number of elements in common in A and B