Simple calculus question

...What? This doesn't make any sense. For one, what is lim(x -> y) not supposed to equal? You never say.

Baww, bad example. I meant more like. Uh. Say we have a function f(x) = x. Then lim(x -> a) should be f(a + epsilon) = f(a - epsilon) where you let epsilon go towards 0. Then that will never happen unless f(x) = k or that f(x) = k * sin or k * cosin and that x is an element in the value handed to sin or cosin.

And bahh. Infinity isn't a number.