Question

let $u = \\{5, 6, 7, 8, 9, 10, 11, 12\\}$, $a = \\{6, 8, 10\\}$, $b = \\{5, 6, 9, 12\\}$, and $c = \\{5, 7, 9\\}$. find the following. (enter your answers as a comma-separated list.)
$(a \cup b)$

Explanation:

Step1: Find $A \cup B$

Combine elements of $A$ and $B$:
$A \cup B = \{5, 6, 8, 9, 10, 12\}$

Step2: Find $(A \cup B)'$

Subtract $A \cup B$ from universal set $U$:
$(A \cup B)' = U - (A \cup B) = \{7, 11\}$

Answer:

7, 11