1. Not finding help here? Sign up for a free 30min 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!

A qustion that my solution differs from the answer of the book

  1. Mar 9, 2008 #1
  2. jcsd
  3. Mar 9, 2008 #2


    User Avatar
    Staff Emeritus
    Science Advisor

    You are misreading the question. They are not asking you to find vector v such that T-1= b. The "-1" is a sub script, not superscript. They have defined Ta and asked you to solve T-1v= b. In other words, Ta with a= -1. Just row reduce the augmented matrix with A itself,, not A inverse.

    By the way, if they were asking you to solve A-1v= b when they had given you A, you certainly should not find A-1 and then solve the equation! If you know A, the you know that AA-1v= v= Ab. Just multiply vector b by A.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?