Please help identify equation Message #1 Posted by Egan Ford on 9 Sept 2008, 7:04 p.m.
Recently my wife gave me a gift (just because). It was wrapped in paper covered with many equations. Most of them from first year calculus and physics with a finance equation thrown in.
But, one of the equations I've seen and perhaps even used, but after a month of staring at it I have been unable to remember where I'd seen it or why I used it.
Thanks.
oo

\ f^{(i)}(0)
f(x) = .  x^{i}
/ i!

i=0
