This Group Hasn't Died Yet...

Although I'm probably the only person in this group that's still on this site, and probably the only person who will read this, I have another thing to post. It's a limit of a function of several variables--something I've learned in the time since I (since anyone) last posted here. The limit does, in fact, exist and is a real number. Trying to account for this site's lack of math symbols/text: Evaluate lim (x,y)-->(0,0) of (x^2 + y^2) / (sqrt(x^2 + y^2 + 1) - 1). I'll post the answer in about a month, right before I start my second semester of college (which will include an even more advanced math class).