OH ok thank you very much! I still have some other questions though (on different problems...)
WHat is
[lim x->3 from the right] (sqrt(t^2-9))/(t-3)
post new questions in a new thread and recall that
(of course, you already posted this question here, so don't bother making a new thread for this. (it has happened before, so i just thought i'd say it))
I didn't. =/ If I break it into (t-3)(t+3), do I have to square it to get rid of the square root? What do I do from there?
you cannot just square stuff. you can possibly change the value of the function and hence its limit. cancel where you can cancel and see what happens. you should notice there is a common (t - 3) in the numerator and denominator