Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

{$a;e;i;o;u;m;n;f;g;h$}
The union of two sets consists of the elements that are in the first set, in the second set or in both sets: {$a;e;i;o;u$}}$\cup${$m;n;f;g;h$}$=${$a;e;i;o;u;m;n;f;g;h$}