I was given some review questions for a test and one of them is
Lim as(x->infinity) of (2x-(4x^2+2x)^1/2). I've tried multiplying by the reciprocal but it didn't seem to get me anywhere; I'm not really sure how to approach the problem in any other way. Is there something I'm missing?
but sorry actually, now that I'm looking at it, how do I pull the 2x out of the radical? Looking at the answer, the limit approaches -.5, but I don't see how one would end up with a 2 on the bottom of the fraction...sorry, I'm sure i'm just missing something obvious here