Question

se A = ( 2,3,5,6,7,8), B = ( 1,2,3,6,8) C = ( 1,4,6,8) , dertermine:

A) (A-B) interseção C.
B) B-(C união A).
C) (B-A) interseção C.

ME Ajudem a responder por favor vale 50 pontos

Answer 1

A)
A - B = {2,3,5,6,7,8} - {1,2,3,6,8} = {5,7}
(A-B) ∩ C = {5,7} ∩ {1,4,6,8} = ∅

B)
C U A = {1,4,6,8} U {2,3,5,6,7,8} = {1,2,3,4,5,6,7,8}
B - (CUA) = {1,2,3,6,8} - {1,2,3,4,5,6,7,8} = ∅

C)
B - A = {1,2,3,6,8} - {2,3,5,6,7,8} = {1}
(B-A) ∩ C = {1} ∩ {1,4,6,8} = {1}