If A is a 3-rowed square matrix and │A│=5 then │adj A│=? A. 5 – InterviewSolution

1.

If A is a 3-rowed square matrix and │A│=5 then │adj A│=? A. 5 B. 25 C. 125 D. none of these

Answer»

The property states that │adj A│= │A│^n-1

Here n= 3 and │A│=5

│adj A│= │5|^3-1

= │5│²

= 25

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