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Variables in a matrix

  1. Jan 29, 2007 #1
    if I am given this to solve:
    Mx = b
    where M
    [0 0]
    [1 2]
    [0 0]
    [3 6]

    and b = [b1, b2, b3, b4]t

    does that mean I have vector x as 4 elements, i.e. x1-x4 or just x1 and x2?

    thanks

    edit: oh, wait... rank is 2, so its only x1 and x2, right?
     
    Last edited: Jan 29, 2007
  2. jcsd
  3. Jan 29, 2007 #2

    cristo

    User Avatar
    Staff Emeritus
    Science Advisor

    Your vector will be x=[x1 x2]T
     
  4. Jan 29, 2007 #3
    oh, didn't refresh in time... thanks :)
     
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