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Help with a linear algebra problem

  1. Aug 30, 2008 #1
    i need help with a linear equation problem. I started the problem and after a few steps i checked the problem in the solution manual and there seem to be a typo in the text so i wanted to have someone check my work if i was doing it correctly. if i made a mistake can someone please correct me and tell me what i did wrong.

    1. The problem statement, all variables and given/known data

    matrix[(1,1,1), (1,1,0), (1,0,0)]

    2. Relevant equations
    The solution in the manual had the same steps as below only the matrix was different it
    was matrix [(1,1,0), (0,0,-1), (0,-1,-1)].

    3. The attempt at a solution
    so i first i did R2 [tex]\rightarrow[/tex] R2 - R1.
    Then i did R3[tex]\rightarrow[/tex]R3-1.
    so my new matrix was [(1,1,1), (0,0,-1), (0,-1,-1)].
    1. The problem statement, all variables and given/known data

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Aug 30, 2008 #2
    You're good so far, keep going.
  4. Aug 30, 2008 #3
    so is my matrix correct and there is a typo in the book?
  5. Aug 30, 2008 #4
    Yes, bc R1 should not change.
  6. Aug 30, 2008 #5
    thanks a lot now i know the book has a few typos because i have encountered a few
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