If A is a 3-rowed square matrix and │A│= 4 then adj(adj A) = ? A. – InterviewSolution

1.

If A is a 3-rowed square matrix and │A│= 4 then adj(adj A) = ? A. 4A B. 16A C. 64A D. none of these

Answer»

The property states that

adj(adj A) = |A|^n-2 . A

Here n = 2

adj(adj A) = |4|^3-2 . A

= 4A

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