Question

Dados os conjuntos a= (2,4,5), b= (5,6,8,9)e d 0,3,9,12,15 então aub-d e igual?

Answer 1

A união de B menos D

A e B= (2,4,5,6,8,9) 
AuB-D= A união de B menos D= (0,3,9,12,15)
AuB-D= (2,4,5,6,8)
  

Answer 2

AuB=(2,4,5,6,8,9)

AuB-D=(2,4,5,6,8)