1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Summation - Im new to this

  1. Jun 8, 2009 #1
    2008
    Summation (-1)[tex]^{i}[/tex] [tex]\frac{i^2+i+1}{i!}[/tex]
    i=1



    I guess im suppose to apply the summation rule

    and i got (-1)[tex]^{i}[/tex] [tex]\frac{n(n+1)(n+2)+3n}{3i!}[/tex]
     
  2. jcsd
  3. Jun 8, 2009 #2

    CompuChip

    User Avatar
    Science Advisor
    Homework Helper

    What summation rule are you talking about?
    What is n in your final answer?
    How can it depend on i anyway, if you are summing over that?

    Please elaborate a bit more on how you wanted to solve the question.
     
  4. Jun 9, 2009 #3
    n is 2008.

    Im uncertain of the application of summation - factorial.
     
  5. Jun 9, 2009 #4

    Cyosis

    User Avatar
    Homework Helper

    Could you answer CompuChip's first question? Secondly are you sure the sum is listed correctly, because when I plug it into mathematica it gives a pretty terrible result. Not something one new to summations would be expected to do.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Summation - Im new to this
  1. Summation ? (Replies: 4)

  2. Question in summation (Replies: 9)

  3. Summation Question (Replies: 7)

  4. Summation problem (Replies: 4)

Loading...