## Precalculus (6th Edition)

$A' = \left\{2, 6, 9, 10\right\}$
Given: Universal set: $U=\left\{1, 2, 3, 4, 5, 6, 7, 8, 9, 10\right\}$ $A=\left\{1, 3, 4, 5, 7, 8\right\}$ RECALL: $A'$ is the set the contains the elements of the universal set that are not in $A$. Thus, $\color{blue}{A' = \left\{2, 6, 9, 10\right\}}$