>>48
That's alright. It sounds like you're foreign, so I don't blame you for not being completely rigorous in putting across what you intended to mean. There isn't a geometric series for pi or e. I'm guessing you don't mean Euler's constant by "Euler's number", but e. Euler's constant we know almost nothing about.
Also, <<One cannot define a point in infinity, therefore no number could be placed there. Maybe an unknown, but not a number.>>
Complex analysis (along with many topological spaces) frequently makes use of a "point at infinity" which helps immeasurably in theoretical proofs and so on. It might not be as intuitive a notion, but it's treated in the same way as other complex numbers.