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Homework Help: Gaussian elimination

  1. Jul 30, 2012 #1
    1. The problem statement, all variables and given/known data

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

    2. Relevant equations

    3. 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!!

  2. jcsd
  3. Jul 30, 2012 #2
    Can you please show your work so that we may see how far you have gone and where you have gotten stuck?
  4. Jul 30, 2012 #3
    I do not see anything special about this system. Show us what goes wrong for you.
  5. Jul 30, 2012 #4
    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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