Summation inside a summation inside a summation

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Homework Help Overview

The discussion revolves around a complex summation problem involving multiple layers of summation. Participants express confusion regarding the correct approach and the definitions of variables involved.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to clarify the steps involved in solving the summation, questioning the roles of variables K and J. Other participants discuss their own calculations and interpretations, raising concerns about potential errors in their reasoning.

Discussion Status

There is an ongoing exploration of different interpretations of the summation. Some participants have provided insights or corrections, while others are still seeking clarity on specific aspects of the problem.

Contextual Notes

Participants mention confusion over variable definitions and the structure of the summation, indicating a need for clearer understanding of the problem setup.

qwerty12345
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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?
EDIT:
IMG_20120915_222841.jpg


I tried this, but it doesn't seem like I'm on the right track.
 
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IMG_20120915_230928.jpg


But I also solved it with a calculator and it says the answer is 81. What am I doing wrong?
 
Nevermind. I figured it out. :D

IMG_20120915_232603.jpg
 
1-1+1 = 1 not -1 ... that's if you mean i - j + k and not i - (j + k) .
 

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