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Math Help - Matrix multiplication

  1. #1
    Junior Member
    Joined
    Aug 2009
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    47

    Wink Matrix multiplication

    I need some guidance here...
    Matrix multiplication-matrixmuliply.gif
    How do I multiply these three?


    I only know how to multiply when it looks like this...
    Matrix multiplication-multply2.gif
    But I cant figure out how to do with the one above. Plz help
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  2. #2
    Super Member
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    Quote Originally Posted by sf1903 View Post
    I need some guidance here...
    Click image for larger version. 

Name:	MatrixMuliply.gif 
Views:	30 
Size:	866 Bytes 
ID:	13728
    How do I multiply these three?


    I only know how to multiply when it looks like this...
    Click image for larger version. 

Name:	multply2.gif 
Views:	30 
Size:	1.5 KB 
ID:	13729
    But I cant figure out how to do with the one above. Plz help
    Remember that ABC = (AB)C = A(BC). So you can either first multiply the first two and then multiply the result by the third, or first multiply the last two and then multiply the result by the first.
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  3. #3
    Newbie
    Joined
    Oct 2009
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    Hi,



    Then you keep this result and multiply with the last matrix:

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