Take the 2-minute tour ×
Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. It's 100% free, no registration required.

This question already has an answer here:

I need help calculating the central value of the partial exponential function :

$$\lim_{n \to \infty} e^{-n} \sum^n_{k=0} \frac{n^k}{k!}$$

fd

share|improve this question

marked as duplicate by robjohn Mar 18 '13 at 23:17

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

1  
Related to a sum of independent Poisson random variables with parameter 1 –  user66322 Mar 18 '13 at 22:37

2 Answers 2

up vote 2 down vote accepted

This has already been answered here.

share|improve this answer

I think it goes to 1/2 ... after all, you have half the series :-)

share|improve this answer
    
What do you mean by "half the series"? –  Chris Mar 18 '13 at 23:06

Not the answer you're looking for? Browse other questions tagged or ask your own question.