Le Tue, 29 Nov 2011 18:43:46 -0500,
Robert Xu <robxu9@...> a �crit :

> +x as x goes to infinity (disclaimer: I am doing physics hw)
Should I be you, I would have explicitly mentioned that x goes to
positive infinity : it could have been negative infinity, or even
unsigned infinity (for example with the Alexandroff compactification of
R) ;)