Question

Perform the given set operation. Let U = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}. (Enter your answers as a comma-separated list. Enter EMPTY for the empty set.)
{1, 2, 8} ∩ {2, 8, 9}

Answer 1

you want the set of elements common to your two sets. So, which numbers are in both lists?