Question

prove that :-

A is subset of B =Complement of B is subset of Complement of A​

Answer 1

Answer:

let A ( 1,2,3)

let B(1, 2,3,4)

let U(1, 2,3,4,5)

so

B'(5)

A'(4, 5)

so it is clear that B' is sunset of A'