Let U = { 4,5,6,7,8,9,10} and A = {4,6,9,10}.

Question

Find A '?

Answer 1

The complement of set A denoted by A ' is the set U - A ; that is

                                 A ' = { x ∈ U | x does not belongs to A }.

Set U = {4, 5, 6, 7, 8, 9,10} and A = {4, 6, 9, 10}.

A ' = U - A.

= {4, 5, 6, 7, 8, 9, 10} - {4, 6, 9, 10}

= { 5, 7, 8 }.

A ' = { 5, 7, 8 }.