How do you find the inverse of a 3x3 matrix and up (meaning bigger dimensions like 4x4, 5x5) with pencil and paper? I know how to do it with a 2x2 matrix by the book. Find the determinant which is ad-bc assuming the matrix :
[a b]
[c d]
then the inverse is:
[(d/(ad-bc)) (-b/(ad-bc))]
[(-c/(ad-bc)) (a/(ad-bc))]
I''ve been just using my calculator for 3x3 calculations and up because there has been nothing in my book so I''m assuming that I really don''t need to know this but I want to know what''s going behind the scenes in the calculator.
This is not a homework question
I''m expanding my knowledge on the feeble base that I already have. Thanks in advance.
Charles Hwang -aka Tazel
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