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 inside a summation inside a summation

  1. Sep 15, 2012 #1

    I know how to do it normally, but this confuses me. Can you show me how to do it? And what were the steps you took... etc. Initially, I thought of putting them inside brtackets and work out the last one at the right first, but I'd need to know what K and J are, it's confusing. Can anyone make this clear for me?


    I tried this, but it doesn't seem like I'm on the right track.
    Last edited: Sep 15, 2012
  2. jcsd
  3. Sep 15, 2012 #2

    But I also solved it with a calculator and it says the answer is 81. What am I doing wrong?
  4. Sep 15, 2012 #3
    Nevermind. I figured it out. :D

  5. Sep 15, 2012 #4


    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Gold Member

    1-1+1 = 1 not -1 ... that's if you mean i - j + k and not i - (j + k) .
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Summation inside a summation inside a summation
  1. Summation of series (Replies: 2)

  2. Summation problem (Replies: 3)

  3. Summation of series (Replies: 4)

  4. Summation question (Replies: 5)

  5. Summation by steps (Replies: 7)