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Homework Help: Matrix Help ahhh

  1. Oct 13, 2007 #1
    Matrix Help!! ahhh

    http://img152.imageshack.us/img152/9982/matrixnq8.gif [Broken]

    What values of k does the system not have a solution?

    I don't know how to do this question. Anybody have any ideas? :)
     
    Last edited by a moderator: May 3, 2017
  2. jcsd
  3. Oct 13, 2007 #2

    danago

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    Perform a matrix operation to one of the rows so that you can solve for one of the variables, in terms of k. What i would do is eliminate the 1 from the bottom row, so that it is of the form:

    [ 0 f(k) g(k) ]

    Then use the fact that if 0x = c (where c is some non zero constant), then the equation cannot be solved.
     
  4. Oct 14, 2007 #3

    malawi_glenn

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    Another way to do this is when the determinant of the matrix is zero, then this system of equations has no solution.
     
  5. Oct 14, 2007 #4

    Hurkyl

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    Yes: try and solve the system.
     
    Last edited by a moderator: May 3, 2017
  6. Oct 14, 2007 #5
    You mean no unique sol'n. This is for the op's knowledge.
     
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