Question about simplifying Sigma notation

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Discussion Overview

The discussion revolves around simplifying an expression involving sigma notation, specifically the sum ∑i=1log(n) 1(log(n) - i). Participants are exploring the reasoning behind a proposed simplification to log(n).

Discussion Character

  • Exploratory, Technical explanation, Homework-related

Main Points Raised

  • One participant presents an expression to simplify and questions the reasoning behind its simplification to log(n).
  • Another participant introduces a notation involving ##e_i=1^{\text{ insert any integer }}## and queries about the sum ##\sum_{i=1}^{n} a_i##.
  • Further, a participant asks about the number of terms in the sum and the value of each term, specifically questioning the result of raising 1 to any real number.
  • A later reply acknowledges the understanding that the sum involves adding 1 log(n) times, indicating a realization of the process involved.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the simplification process, and multiple viewpoints regarding the interpretation of the sigma notation and its terms are presented.

Contextual Notes

The discussion includes assumptions about the interpretation of terms in the sigma notation and the implications of raising numbers to certain powers, which remain unresolved.

Who May Find This Useful

Students or individuals interested in mathematical notation, particularly in the context of sigma notation and simplification techniques.

RoboNerd
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Hello everyone!

I have this expression which I have to simplify:
i=1log(n) 1(log(n) - i)

And my book apparently simplifies it to being log(n).
I am struggling to figure out why this is the case. Could anyone help?

Thanks!
 
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What is ##e_i=1^{\text{ insert any integer }}## and what is ##\sum_{i=1}^{n} a_i## if you write it out with dots? And finally set ##a_i=e_i##.
 
Firstly, how many terms are there in the sum - ie how many things are being added together?

Secondly, what is the value of each term? What do you get when you raise 1 to the power of any other real number?

EDIT: Uh oh - Jinxed again!
 
Ohh, I see thanks!

We add 1 log(n) times over and over again!

Thanks for the help everyone!
 

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