## Precalculus (6th Edition)

$M \cap R = \left\{2, 4\right\}$
The symbol $\cap$ represents intersection of sets The intersection of sets M and R is the set that contains all the common elements of M and R. The elements that are common to M and R are 2 and 4. Thus, $M \cap R = \left\{2, 4\right\}$.