Solving a System by Gaussian Elimination: Help Needed

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Homework Help Overview

The discussion revolves around solving a system of equations using Gaussian elimination. The original poster expresses difficulty in determining whether a vector belongs to the span of given vectors and encounters challenges during the elimination process.

Discussion Character

  • Exploratory, Problem interpretation, Assumption checking

Approaches and Questions Raised

  • The original poster attempts Gaussian elimination but struggles with achieving the desired row echelon form. Participants inquire about the specific steps taken and where the original poster feels stuck.

Discussion Status

Some participants have requested to see the original poster's work to better understand the issues faced. The original poster later indicates that the problem was resolved after a fresh attempt, suggesting that fatigue may have contributed to the initial difficulties.

Contextual Notes

The original poster mentions running into dead ends and needing more zeros in the bottom row during the elimination process. There is an implication of time constraints affecting the original poster's performance.

charmedbeauty
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Homework Statement



for some reason I am having real trouble trying to solve this system.


Homework Equations





The Attempt at a Solution




a=(10,11,4) v1=(2,1,4) v2=(-1,-2,1) v3=(3,3,-1)

the qstn does a belong to the span (v1,v2,v3)?

so I do gauss elim

but I keep running into dead ends can someone please show just the steps to start i.e. R1=R2 +R3

because every time I have tried I can't get the bottom row to have ENOUGH 0'S!

Thanks.
 
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Can you please show your work so that we may see how far you have gone and where you have gotten stuck?
 
I do not see anything special about this system. Show us what goes wrong for you.
 
voko said:
I do not see anything special about this system. Show us what goes wrong for you.

Well as it turns out it was really easy I just kept making mistakes (it was really late at night)
tried it the next morning and I got it fine.
apparently my brain does not work very well when deprived of sleep. Thanks though
 

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