Quote Originally Posted by Aerith's Knight View Post
Infinity/infinity = infinity

This one demands the theory of L'opital. You have to differentiate both formulas until infinity is on only one side of the divider.
Well, we know that but not the people who were wrong know that and it would stand to reason that if you don't understand why .9... == 1, then you wouldn't understand limits and differentiation, anyways, which means it effectively couldn't be evaluated. Besides, it could equal zero too.

Denmark, it takes way less than a PhD to argue mathematics. Just ask a computer science major.