Răspuns :
a) A×B={(-1,0),(-1,3),(0,3),(0,0),(2,0),(2,3)}
B×A={(0,-1),(3,-1),(0,0),(3,0),(0,2),(3,0)}
b) card (A×B)=6
card (B×A)=6
A = {-1,0,2} și B = {0,3}
a)
A×B = {(-1,0); (-1,3); (0,0); (0,3); (2,0); (2,3)}
B×A = {(0,-1); (0,0); (0,2); (3,-1); (3,0); (3,2)}
b)
card(A×B) = card(A) × card(B) = 3 × 2 = 6
card(B×A) = card(B) × card(A) = 2 × 3 = 6