Write down all elements of ({8, 9, 10} ∩ {9, 10, 11, 12}) ∪ {13, 14}.

Question

(Enter your answer in set notation.)

Answer 1

{8, 9, 10}∩{9, 10, 11, 12} is the set of elements that are in both of the given sets. That's {9, 10}.

 

So the expression you give reduces to {9, 10}⋃{13, 14}. That's the set of elements in either of the given sets, or {9, 10, 13, 14}.