How Do You Expand General Summation Formulas?

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Homework Help Overview

The discussion revolves around expanding general summation formulas, specifically focusing on the structure of summations with varying bounds and terms. Participants are exploring the characteristics of geometric sums and their expansions.

Discussion Character

  • Exploratory, Mathematical reasoning, Problem interpretation

Approaches and Questions Raised

  • Participants are attempting to clarify the correct form of summation expansion, questioning the bounds and terms involved. There is a discussion about whether the expression involves n or k as the variable and how that affects the interpretation of the sum.

Discussion Status

The conversation is ongoing, with participants providing insights and corrections to each other's interpretations. Some guidance regarding the nature of geometric sums has been mentioned, but no consensus has been reached on the specific expansion method.

Contextual Notes

There is a mention of finals, indicating time constraints that may affect participants' focus and clarity in the discussion. The original poster expresses difficulty in recalling summation expansions, which may contribute to the exploratory nature of the conversation.

psycho2499
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I can never remember how to expand a summation into form: \sumnk=1(22). Thats just a recent example. I can't remember the expansion form any sort of summation really except when it has a defined upper bound.
 
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The upper bound is n and the lower bound is 1 isn't it? Looks to me like 4*n.
 
sorry i meant to say 2^n for the eq.
 
Then isn't it n*2^n, or did you mean 2^k? Then it's just a finite geometric sum.
 
this is what i get for only half paying attention to what i type. damn finals. 2^k, Sorry bout that
 

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