Calculus: Early Transcendentals (2nd Edition)

$\lim\limits_{x \to 6}{(4)}=4$
$lets$ $choose$ $f(x)=4$ $\lim\limits_{x \to 6}{(4)}=\lim\limits_{x \to 6}{f(x)}$ when $f(x)=4$ $\lim\limits_{x \to 6}{f(x)}=f(6)=4$ Therefore $\lim\limits_{x \to 6}{(4)}=4$