## Precalculus (6th Edition)

RECALL: (1) The symbol $\cup$ represents union of sets (2) The union of sets A and B is the set that contains the combined elements of A and B. (3) The empty set has no elements. When the elements of the two empty sets are combined, the resulting set is still empty. This means that the union of the two sets is $\emptyset$. Thus, the given statement is true.