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Homework Help: Linear algebra question on Im

  1. Feb 3, 2009 #1
    i got this matrix
    1 1 k
    0 1-k k-1
    0 0 (k-1)(k+2)

    for k=-2
    1 1 -2
    0 -1 -3
    0 0 0

    the k matrix is row reduced
    so after i put k=-2 and transposed it.
    i get no all 0 lines
    so i need to do row reduction again??
  2. jcsd
  3. Feb 3, 2009 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    What's the actual question?
  4. Feb 3, 2009 #3
    what is the general way of finding Im
  5. Feb 3, 2009 #4


    Staff: Mentor

    What does that mean--"finding Im"?

    Going back to your first post, you said you "put k=-2 and transposed it." What does "it" refer to? The matrix? Or do you mean that you interchanged two rows?
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