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Let a be square matrix such that A("adj....

Let a be square matrix such that `A("adj. A")=[(4,0,0),(0,4,0),(0,0,4)]`
then find the value of
(i) `|"adj. A"|` (ii) `|"adj. (adj. A)"|` (iii) `|"adj. (3A)"|`

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The correct Answer is:
8
`A(adjA)=|a|Iimplies|A|=4,n=3`
`|adj(adjA)|=|A|^((n-1)^(2)0=4^(4)=256`
`|adjA|=|A|^(n-1)=16`
`(|adj(adjA)|)/(2||adjA)=256/(2xx16)=8`
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