Respostas

  • Usuário do Brainly
2014-07-09T14:45:45-03:00
A={x,y,z}

b={x,y}

C={a}

D={a,x,y,z,w}

(A U D) - (B U C)=

{a,x,y,z,w} - {a,x,y}=  {a,x,y}
2 3 2