1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Elementary Matrix Question!

  1. Feb 22, 2010 #1
    I have a question about elementary matrices,
    I have matrix A, and I just found A-1, and then the question wants me to write A-1 as a product of elementary matrices.
    Ok, thats easy, but now the question wants me to write A as a product of elementary matrices, how do I go about doing this?
    Would it be the same as writing A-1 as a product of elementary matrices but backwards?
     
    Last edited: Feb 22, 2010
  2. jcsd
  3. Feb 22, 2010 #2
    lol does that question make sense? or should I describe it better?
     
  4. Feb 22, 2010 #3
    If A-1=E3E2E1, then A equals the inverse of that; that is A=(E3E2E1)-1=E1-1E2-1E3-1.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook