## Intermediate Algebra (12th Edition)

$A\cup C= \{ a,b,c,d,e,f,g \}$
$\bf{\text{Solution Outline:}}$ To get the elements of $A\cup C ,$ combine all the elements of $A$ and $C$. $\bf{\text{Solution Details:}}$ The union of $A$ and $C,$ given by $A\cup C$, are the combined elements in $A$ and $C$. With $A=\{ a,b,c,d \}$ and $C=\{ a,e,f,g \}$ then \begin{array}{l}\require{cancel} A\cup C= \{ a,b,c,d,e,f,g \} .\end{array}