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Get matrix A from a series of elementary matrices

  1. Aug 2, 2015 #1
    1. Get A from its inverse IMG_20150802_115613.jpg


    3. I believe it has something to do with the theorem that states: E1E2E3........EkA=I
     
  2. jcsd
  3. Aug 2, 2015 #2

    fzero

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    There's an identity that says that ##(MN)^{-1} = N^{-1} M^{-1}## that would be useful here. You should also consult your text about how to determine the inverse of an individual matrix. They probably discuss the method that uses the matrix of cofactors.
     
  4. Aug 2, 2015 #3
    Thank you very much!
     
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