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Homework Help: Linear Algebra Question

  1. Oct 31, 2004 #1
    Hi,

    I am having so much trouble with this problem, if you can help with in any way possible I will truly appreciate it. This problem deals with Linear Algebra, most important matrices.

    Here is the problem,

    A=

    1 7 2

    2 9 -4

    5 11 6


    B=

    1 8 2

    3 10 4

    5 -12 6

    Calculate

    (a) (AB)32

    (b) (BA)21

    (c) the transpose of B

    (d) if (A -1)31 = (1/det(A))W , find det (A) and W

    Any help will do. Thank you for you for your time.
     
  2. jcsd
  3. Oct 31, 2004 #2

    Hurkyl

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    Gold Member

    This sounds like a straight forward problem of applying the definitions...
     
  4. Oct 31, 2004 #3
    anyone please help me i am having a lot of trouble with the topic
     
  5. Oct 31, 2004 #4

    Hurkyl

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    Staff Emeritus
    Science Advisor
    Gold Member

    Have you tried applying the definitions? Where do you get stuck?
     
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