Math2.org Math Tables: Exponential Expansions

(Math)
FunctionSummation ExpansionComments
  ee= sum (n=0..inf) 1 / n!
= 1/1 + 1/1 + 1/2 + 1/6 + ...		see constant e
  e -1= sum (n=0..inf) (-1) n / n!
= 1/1 - 1/1 + 1/2 - 1/6 + ...
  e x= sum (n=0..inf) xn / n!
= 1/1 + x/1 + x2 / 2 + x3 / 6 + ...