Simplify the following equation for n 1

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Homework Help Overview

The discussion revolves around simplifying the expression \(\frac{1}{(n-1)^2} - \frac{1}{n^2}\) in the context of \(n\) being much larger than 1. Participants are exploring how this expression relates to \(\frac{2}{n^3}\).

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • One participant attempts to combine the fractions into a single term but expresses uncertainty about the next steps, particularly regarding the significance of \(n >> 1\). Others question the correctness of the initial expression and suggest checking for common denominators.

Discussion Status

The discussion has seen some clarification regarding the original expression, with one participant acknowledging a transcription error. There is an ongoing exploration of how to simplify the expression correctly, and some guidance has been provided regarding the need for a common denominator.

Contextual Notes

Participants are working under the assumption that \(n\) is significantly larger than 1, which may influence the simplification process. There is also a note of confusion regarding the transcription of terms in the original problem statement.

roeb
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Homework Statement


show [tex]\frac{1}{(n-1)^2} - \frac{1}{n^2} about= \frac{2}{n^3}[/tex]
n >> 1

Homework Equations


The Attempt at a Solution


The first thing I tried was to put the expression all into one term.
so I got [tex]\frac{-n^2 + 3n - 1}{n^3 - 2n^2 + n}[/tex]
Unfortunately, I'm not sure where to go next with this... I assume it has to do with n >> 1. But I really don't see how they get 2/n^3 if anything I would think -1/n ...
 
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How did you get your expression (in "attempt at a solution" section)? Did you try to get a common denominator?
 


Wait, I see your problem.

The 2nd term in the original expression is 1/n2, not 1/n
 


My apologies, I just realized I did the incorrect substitution from the original problem. I incorrectly transcribed 1/n. It should have been 1/n^2.

I figured it out now, thanks.
 

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