Let A={1,2,3}A = \{1, 2, 3\}A={1,2,3}. What is A×∅A \times \emptysetA×∅?
{(1,1),(2,2),(3,3)}\{(1, 1), (2, 2), (3, 3)\}{(1,1),(2,2),(3,3)}
∅\emptyset∅
{(1,∅),(2,∅),(3,∅)}\{(1, \emptyset), (2, \emptyset), (3, \emptyset)\}{(1,∅),(2,∅),(3,∅)}
{1,2,3}\{1, 2, 3\}{1,2,3}