Find the inverse of the matrix A =  1 2 - 2 - 1 3 0 0 - 2 1  by using elementary row transformations.

                                                               OR

Using properties of determinants, prove the following :

a b - c c - b a - c b c - a a - b b - a c = a + b - c   b + c - a c + a - b

 

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  • 1
find its cofactor
arrange it and find its transpose
that is its adjoint then use this formula
A-1=(1/IAI)X(adj A)
or
u can use elementary operation
also
contact me if u want a BF
  • 1
Read the textbook one or two times. Find the keywords and note it down.  Look references and guidelines. Try solving Problems.Ask only difficult Keywords
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