Given A 3457 B 29 C 71112 while U x x is a positive inte

Given A = {3,4,5,7}, B = {2,9}, C = {7,11,12} while U={ x | x is a positive integer less than 20} find:

A U B =

A n B =

A n C =

A\' =

A U B U C =

Solution

A U B = {2, 3,4,5,7,9}

A n B = { } = null set

A n C = { } = null set

A\' = { 3,4,5,7,11,12}

A U B U C ={2,3,4,5,7,9,11,12}