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Weird Matrices

  1. Mar 24, 2008 #1
    1. The problem statement, all variables and given/known data
    [​IMG]

    2. Relevant equations
    I think it may have to do with inverse matrices or multiplication using the identity matrix

    3. The attempt at a solution

    I got the inverse of...

    1,-2, 2, 2,-3
    3,-5, 6, 2,-4
    2,-2, 5,-4, 4
    1,-3, 1, 7,-8
    3,-4, 7, 0, 2

    as...

    -6,-14,25,20,-7
    2,-13,19,14,-5
    4, -2, 1, 0, 0
    0, -1, 1, 1, 0
    -1, 2 ,-3,-2, 1

    and I premultiplied that to...

    87, 57, 10,117,-101
    208,232,133,330,-146
    83,297,235,229, 116
    154,-58,-97,112,-245
    240,382,278,370, 092

    But nothing really seems to make sense. Thanks if you can help!
     
  2. jcsd
  3. Mar 24, 2008 #2
    It looks to me like it's one big giant matrix and you'd have to do the row operations to get the first 5 columns in the identity format and see what that does to the last 5 columns.
    Are you looking for the norm of columns 6-10? The question isn't entirely clear to me.
     
    Last edited: Mar 24, 2008
  4. Mar 24, 2008 #3
    Yes, you have to do raw, direct calculations. But the semi-identity matrix will make it easier
     
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