## Thinking Mathematically (6th Edition)

$\left\{18, 19, 20, 21, 22, 23, 24\right\}$
$N$ is the set of natural numbers, which are the numbers $1, 2, 3, ...$. Since $x$ is an element of the $N$ and 17 is less than $x$ but $x$ is less than or equal to $2$, then the possible values of $x$ are $18, 19, 20, 21, 22, 23,$ and $24$. Thus, the roster method equivalent of the given set is: $\left\{18, 19, 20, 21, 22, 23, 24\right\}$