## Precalculus (6th Edition)

Disjoint sets are sets with no common elements. The set of negative integers is: $\left\{-1, -2, -3, -4, ...\right\}$. The set of whole numbers is: $\left\{0, 1, 2, 3, 4, ...\right\}$. Notice that the two sets have no common elements. Thus, the given statement is true.