Question

Find
A ∩ B.
(Use the roster method to write the set. Enter EMPTY or ∅ for the empty set.)
A = {6, 7, 8} B = {7, 8, 9}

A ∩ B =


I'm so confused, my head hurts, i tried every way, and i can't seem to get this right...HELP!

Answer 1

\(\cap\): the intersection, is all the elements that occur in both sets

Answer 2

A ∩ B = {7, 8}