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!

I want check my answers

  1. Apr 8, 2010 #1

    here I put my answer as a picture


    [PLAIN]http://up.arab-x.com/Mar10/HnA33086.jpg [Broken]


    [PLAIN]http://up.arab-x.com/Mar10/8SE29265.jpg [Broken]

    http://arb-up.com/i/00020/a00rnukl7nt0.jpg [Broken]

    http://arb-up.com/i/00020/88tl6yd7jk3p.jpg [Broken]

    http://arb-up.com/i/00020/2d5d712yhh03.jpg [Broken]
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Apr 8, 2010 #2


    Staff: Mentor

    You have obviously made a mistake somewhere, either in the inverse or in your check. When you multiplied A-1 by A, you should have gotten the identity matrix I, but you didn't. That should be a clue that you've done something wrong.
    Last edited by a moderator: May 4, 2017
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook