Let U = {5, 6, 7, 8, 9, 10, 11, 12, 13, 14}, A = {5, 7, 9, 11, 13}, B = {6, 8, 10, 12, 14}, and C = {5, 6, 8, 9, 12, 13}. List the elements of each set.

Question

i just need help

Answer 1

The elements of a set are just the different things written inside the braces.  So, the elements of set U are just the numbers 5, 6, 7, 8, 9, 10 , 11, 12, 13, and 14.  Each one is an element.

 

Are you sure the question didn't ask about the elements of the union or intersection of some of those sets?  That would be a more common question on a problem like this.  If that's what you're looking for, the union of two sets is the list of elements that exists in any set.  For example, if A = {1,2} and B = {2,3}, the union of A and B would be {1,2,3}, because that's a list of everything in either A or B.  The intersection is more restricted, and is a list of all the elements that exists in all of the sets you're dealing with.  So, the intersection of A and B would just be {2}, because that is the only element that both sets share.