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!

Re-writting an Equation

  1. Jul 16, 2009 #1
    1. The problem statement, all variables and given/known data

    Hello,

    I have the following equation:

    [tex]f(x)=\sum_{r=m}^{M_B}\,\sum_{i=0}^{M_B-r}\,\sum_{j=0}^{r+i}\,\sum_{k=0}^{j(N_B-1)}(-1)^{i+j}{M_B\choose r}{M_B-r\choose i}{r+i\choose j}\left(\frac{x}{C}\right)^k\,e^{jx/C}[/tex]

    and I want to write it in the form of [tex]f(x)=1+R(x)[/tex]


    2. Relevant equations

    [tex]m[/tex] will be any number from 1 up to [tex]M_B[/tex], and [tex]f(x)=1-e^{x/C}[/tex] for [tex]M_B=N_B=1[/tex].


    3. The attempt at a solution

    I tried to extract the following parameters to have the 1 value:

    [tex]r=M_B, i=0, j=0, k=0[/tex]

    but after that I don't know what to do by the indices. It does not seem straightforward as one can see.

    Regards
     
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted



Similar Discussions: Re-writting an Equation
  1. Re-post Solution to DE (Replies: 5)

  2. Re-writing a PDE (Replies: 2)

Loading...