Răspuns:
Explicație pas cu pas:
1 A={-4,-3}
B={1,2,3}
a)AXB={(-4,1),(-4,2),(-4,3),(-3,1),(-3,2),(-3,3)}
b) BXA={(1,-4),(1,-3),(2,-4).(2,-3),(3,-4,(3,-3)}
c)AXA={(-4,-4),(-4,-3),(-3,-4),(-3,-3)}
d)BXB={(1,1),(1,2),(1,3),(2,1),(2,2),(2,3),(3,1),(3,2),(3,3)}
2 a)Card (AXB)=15 Card A=5 ⇒ Card B=3
b)Card(AXB)=Card(BXA)=10
