It really doesn't matter because behaves like by the limit camparison test.
Hi p75213...are you a Stargate fan? (if you get that, you are )
Anyway, your problem is in the form of the ratio test for convergence, which basically lets you compare your series to a geometric series to determine it's behavior. I think you'll find your proof here.
http://www.math.scar.utoronto.ca/cal...ture43-rev.pdf
Hope that helps,
Be well,
T