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Question

Find the inverse of matrix by adjoint method
A=123231312

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Solution

A=123231312
|A|=1(61)2(43)+3(26)
5212
9
Minor of A=514145451
Cof(A)=51414+54+51
adj (A)=514115451
A1=adj(A)|A|=19514145451
=19514145451

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