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    hello ppl..
    i am a newbie on this form...i need help with calculation of a 3 by 3 matrix...i find it quiet a tedious process and i m looking for a step by step process guide...need urgent help...i have an exam tomorrow...
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    (Original post by aisha gadit)
    hello ppl..
    i am a newbie on this form...i need help with calculation of a 3 by 3 matrix...i find it quiet a tedious process and i m looking for a step by step process guide...need urgent help...i have an exam tomorrow...
    http://www.mathsisfun.com/algebra/ma...-adjugate.html
    Or http://www.mathsisfun.com/algebra/ma...ss-jordan.html
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    There is no quick and simple way to find the inverse of 3x3 matrices. You have to remember the process and follow it through.
    Page 75: http://filestore.aqa.org.uk/subjects...4-TEXTBOOK.PDF

    Otherwise you can google some YT videos that get inverses using cofactors and that would reflect on what's in that book.
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    calculation of inverse of a 3 by 3 matric is itself a tedious process and there is no shortcut to it for sure...but if you do it step by step ..it gets quiet easier...i was also looking for a easier solution..so i found this video ..it explains the process in quiet a simpler way...hope it helps..
    chk out this video
    https://www.youtube.com/watch?v=4aYK7Hv487g
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    (Original post by aisha gadit)
    hello ppl..
    i am a newbie on this form...i need help with calculation of a 3 by 3 matrix...i find it quiet a tedious process and i m looking for a step by step process guide...need urgent help...i have an exam tomorrow...
    determinant - D
    matrix of minors - M
    cofactor - C
    then transpose that - CT

    Then just 1/D * CT

    Idk if that helps but as others have said its long and tedious and theres no getting around that, but i found at easier to just remember those 4 steps and know how to do 4 smaller steps rather than think of it as one big process. I mean I still remember that from 2 months ago very clearly.

    Sorry if this doesnt help though, and good luck in your exam tomororw

    Edit: 14 hours ago, im probably too late, idk why this came up on my sidebar :rofl:
 
 
 
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