perform this operation:

________
{2,7,10}

what's U?

Let U = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}.

Then, the complement of the given set is the set of all elements of U not in the set:

{1,3,4,5,6,8,9}

thank you i compared answers I think I have a complement set now!!

It seems like you are looking for information about an operation performed on the set {2, 7, 10}. However, you haven't specified what operation you would like to perform on this set. Could you please provide more details or clarify your question?