How do I find a limit with two variables??? 1. The problem statement, all variables and given/known data lim(x->0)((1+ax)^(1/3)/(xln(1+x))-(arctan(bx)/(x^3)) http://www.wolframalpha.com/input/?i=lim%28x-%3E0%29%28%281%2Bax%29^%281%2F3%29%2F%28xln%281%2Bx%29%29-%28arctan%28bx%29%2F%28x^3%29%29 I understand that since the denominator x^3ln(1+x)---> 0 then the counter must also go to zero. But what I do not understand is that since the counter has TWO variables, I always get a function of those two, instead of a solution of each. The answer in WA isn't even sensible either UPDATE: I have figured some of it, found out that a= -3/2 and b= 1 Now how do I find the limit?