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Evaluating Infinite Series

  1. Dec 14, 2006 #1
    How do I evaluate the infinite series (2^n)/(n!) from n=0 to infinity?
    (I dont know how you put the little E symbol and all that in so I had to write it out.)

    I already found that it converges to 0 using the ratio test, but I dont know quite how to evaluate it.

    Any help would be mondo appreciated! Thank you!!!
  2. jcsd
  3. Dec 14, 2006 #2


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    Science Advisor

    Have you dealt with Taylor's series? In particular, do you know the Taylor's series for ex?
  4. Dec 14, 2006 #3
    We went over them, but I'm not sure how to use them...
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