## College Algebra (11th Edition)

$C\cup E= \{ 1,3,5,7 \}$
$\bf{\text{Solution Outline:}}$ To get the elements of $C\cup E ,$ combine all the elements of $C$ and $E$. $\bf{\text{Solution Details:}}$ The union of $C$ and $E,$ given by $C\cup E$, is the set that contains the combined elements of $C$ and $E$. With $C=\{ 1,3,5,7 \}$ and $E=\{3,7\}$ then \begin{array}{l}\require{cancel} C\cup E= \{ 1,3,5,7 \} .\end{array}