1. The problem statement, all variables and given/known data Is it true that e find that the function is undefined and we can't simplify them, then the limit of multivariable function is surely doesn't exist http://imgur.com/a/cihXu 2. Relevant equations 3. The attempt at a solution Is it possible that we already try many different of y = x^n , n is all real number , the limit still the same ? ( the limit of function actually not exist , but in our working we have tried many different of y = x^n , n is all real number , we keep on getting the limit of the graph still the same ) ?