Question

Sendo A = {1, 3, 4, 5, 6}, B = {2, 4, 5, 7, 8} e C = {4,
5, 6, 7, 8}, calcule o valor de:
a) (A – B) ∩ C
b) (C ∪ A) ∩ (B – A)
c) [(A – B) ∩ (A ∪ C)] – (A – C)

Answer 1

a) (1,3,6)∩ (4,5,6,7,8) =(6)
b) (1,3,4,5,6,7,8)∩(2,7,8)=(7,8)
c) [ (1,3,6)∩(1,3,4,5,6,7,8)] - (1,3)
    [1,3]-(1,3) ={}    (vazio)

Answer 2

a) (1,3,6)∩ (4,5,6,7,8) =(6)
b) (1,3,4,5,6,7,8)∩(2,7,8)=(7,8)
c) [ (1,3,6)∩(1,3,4,5,6,7,8)] - (1,3)
    [1,3]-(1,3) ={}    (vazio)