Question

Misal a ={1,2,3} dan b ={2,1,5}. maka[a union b]-a=

Answer 1

A union B = {1,2,3,5}-a
= {5}

Answer 2

A ={1,2,3}
b ={2,1,5}.

[a union b] = {1,2,3,5}
[a union b]-a= {5}