Question

sejam os conjuntos x= (3,6,9,14,18,20) y=(x/x e multiplico de 3) e z=(x/x e divisor positivo de 12) determine o conjunto : x-y , x-z z-y

Answer 1

A) X-Y = {14,20}
B) X-Z = {9,14,18,20}
C) Z-Y = {1,2,4}