(a) If A is a matrix of order 3 and |A| = 8 then | adjA | = .
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1 0 0
0 1 0
0 0 1.
=1(1-0)-0(0)+0(0)
=1
|A|=8
adj A= 1÷|A|
=1÷8
adj A =0.125..
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