Chapter P, Prerequisites - Section P.2 - Real Numbers - P.2 Exercises - Page 16: 41

(a) A $\cup$ B={1,2,3,4,5,6,7,8} (b) A $\cap$ B={2,4,6}

A union of sets includes all of the numbers of both sets. An intersection of sets includes all common numbers that are a part of both sets. (a) A $\cup$ B={1,2,3,4,5,6,7,8} (b) A $\cap$ B={2,4,6}