Question

Sean A = {1, 2, 3} B = { 2, 5, 6 } y C = {x/x ∈ N; -2 < x < 9 }
Efectúa a) ( A ∩ B ) ∩ C = b) (A – C) ∩ B C) (A – B) U (B – A

Answer 1

A = {1, 2, 3}

B = {2, 5, 6}

C = {-1, 0, 1, 2, 3, 4, 5, 6, 7, 8}

a) (A∩B)∩C

(A∩B) = {2}

(A∩B)∩C = {2}

b) (A-C)∩B

(A-C) = {Ø}

(A-C)∩B = {Ø}

c) (A-B)U(B-A)

(A-B) = {1, 3}

(B-A) = {5, 6}

(A-B)U(B-A) = {1, 3, 5, 6}