I have a problem here with a the syntax of a question. 1. The problem statement, all variables and given/known data "Compute the limit of f as (x,y) approaches (0,0) along the indicated curves. f(x,y) = (x2 - y2)/(x2 + y2) 2. Relevant equations a) y = x b) y = x/2 c) y = x2 d) y = 2x 3. The attempt at a solution I haven't quite started, I've spent most of my time trying to figure out what the conditions under the question meant and how they would change the process of finding the limit. If it means anything, I'm expected to use the sequence definition of limits (which I'm capable of doing, I just don't know how to begin).