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Let A be the matrix: [1 2 0 3] [0 0 0 0] [0 0 1 2] Is A in RREF?

  1. Jul 10, 2005 #1
    I've taken two upper division courses in linear algebra, and yet a trivial problem has arisen that I am having trouble answering! haha

    Let A be the matrix:

    [1 2 0 3]
    [0 0 0 0]
    [0 0 1 2]

    Is A in RREF? I say yes, however, the majority of students whose papers I am grading say no. If they are correct, what is the reason?

    TIA,
    Ryan
     
  2. jcsd
  3. Jul 10, 2005 #2

    matt grime

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    Science Advisor
    Homework Helper

    the row of zeroes should be on the bottom.
     
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