find inverse of matrix A, verify that AA to power -1=1

[king&i]

the inverse of a matrix can be created by a gauss-jordan appoach. consider row operations than turn the first matrix into the second. the inverse is the second part of the second matrix.

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 first matrix        second matrix
 a b c 1 0 0     =    1 0 0 r s t
 d e f 0 1 0     =    0 1 0 u v w
 g h i 0 0 1     =    0 0 1 x y z

Find the inverse of matrix A, listed below, using this technique.

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    2 3 -1
A=  4 2  1
    1 3  5

verify that you have the inverse by using the property that AA to the power of -1=1

[Martingale]

http://www.purplemath.com/modules/mtrxinvr.htm


Where are you stuck?

[king&i]

nvrmd i got it