Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

How does this transition work?

  1. Jul 13, 2011 #1
    Hi there
    I have been stumped by this (probably simple) math transition in the attached file. Can someone please explain it in full detail?
    Big thanks http://postimage.org/image/11vseawf8/" [Broken]

    << edit by berkeman to post the explicit URL >>

    http://postimage.org/image/11vseawf8
     
    Last edited by a moderator: May 5, 2017
  2. jcsd
  3. Jul 13, 2011 #2

    micromass

    User Avatar
    Staff Emeritus
    Science Advisor
    Education Advisor
    2016 Award

    I think you forgot to attach a file :smile:
     
  4. Jul 13, 2011 #3
    You mean, explain what they did? as in they allowed i to take the values 0, 1, and 2 and explicitly wrote the terms of the summation?
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook