operaciones de conjuntos. sean:
u = {1, 2, 3, 4, 5, 6, 7, 8, 9}
a = {1, 2, 3, 4}
b = {3, 4, 5, 6, 7}
c = {7, 8, 9}
hallar:
• a ∪ b =
• a ∪ c =
• b ∪ c =
• a ∩ b =
• a ∩ c =
•b ∩ c =