Question

Considere o conjunto universo S = {x vZ, -3 < x ≤ 12} em que escolhemos os seguintes subconjuntos: A = {-1,2,6,8,12}; B = {1,3,4,5,11,12}; C = {-2,1,2,4,6,12}. O subconjunto de A – (B ∩ C) é:
A) {6,12};
B) {2,6,12};
C) {7,9};
D) {-1,2,6,8}.

Answer 1

S = {x ∈ Z | -3 < x ≤ 12}

A = {-1,2,6,8,12}

B = {1,3,4,5,11,12}

C = {-2,1,2,4,6,12}

A – (B ∩ C) =

{-1,2,6,8,12} – {1,3,4,5,11,12} ∩ {-2,1,2,4,6,12} =

{-1,2,6,8,12} – {1,4,12} =

{-1,2,6,8}

D) {-1,2,6,8}