1.

If possible , using elementary row transformations , find the inverse of the following matrices : (i) [{:(2,-1,3),(-5,3,1),(-3,2,3):}] (ii) [{:(2,3,-3),(-1,-2,2),(1,1,1):}] (iii)[{:(2,0,-1),(5,1,0),(0,1,3):}]

Answer»


Answer :(i) `=[{:(-7,-9,10),(-12,-15,17),(1,1,-1):}]`
(ii) `=[{:(1,0,-2),(2,1,-2),(0,0,1):}].A`
(III) `A^(-1)=[{:(3,-1,1),(-15,6,-5),(4,-2,2):}]`


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