A is a 3*3 square matrix, prove that, | adj A = | A |²
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If you have a square matrix of order n then,
|adj A|=|A|^{n-1}
here,
|A|=5
so,
|adj A|=5^{3–1}=25
|adj A|=|A|^{n-1}
here,
|A|=5
so,
|adj A|=5^{3–1}=25
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