Epsilon delta limit (Example 4): Limits at infinity

This part of the epsilon-delta series covers limits at infinity. You can find Examples 1 and 2 on blackpenredpen's channel, and Example 3 on my channel. Enjoy! Note: I realized after the fact that this limit may be a bit too simple, but if you want to prove that the limit of f at infinity is L, you do the same argument as in the video, except with |f(x) - L| instead of just |f(x)|.