Question

Dados os conjuntos A= (1,2,3), B= (3,4) e C= (1,2,4). Ache o conjunto M tal que:

A) A ∪ M = (1,2,3)

B) B ∪ M = (3,4)

C) C ∪ M = A ∪ B

Answer 1

M ={3}
Pois A U M = {1,2,3}
B U M= { 3,4}
C U M = A U B = {1,2,3,4}
Logo M = {3}