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

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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

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1 Answer

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Best 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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