Chapter 0, Problem 1T

(a)

To determine

To calculate: The elements of the set $A\cup B^{\prime }$, where $U=\left\{1,2,3,4,5,6,7,8,9\right\}$, $A=\left\{x:x\text{is even and}x\ge 5\right\}$, and $B=\left\{1,2,5,7,8,9\right\}$.

(b)

To determine

A set having two elements that is disjoint from the set $B=\left\{1,2,5,7,8,9\right\}$.

(c)

To determine

A nonempty subset of the set $A=\left\{x:x\text{is even and}x\ge 5\right\}$ that is not equal to the set A.