Recent content by Sleighty

Hi, thanks for correcting that mistake, but should i apply L'Hopitals rule in this case? i can't tell :(

thanks mate :) I am pretty noob at calculus. :( EDIT: what happened to the cos x in the equation?

Homework Statement lim x -> infinity : sqrt(x^2 + 4x(cos x) ) - x find the limit (or lack there of) Homework Equations look above The Attempt at a Solution ok so i used the addition/subtraction law to show that the limit of f(x) = - x as x --> infinity = infinity now for the other half...

HI guys, I just started university and I have no idea what is going on in my lectures. My lecturer doesn't explain anything well and he is also the bloke who takes my tutorials. Lose - lose situation! Anyways I am trying to learn this myself, but I am stumped on this question: Homework...