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If A=[{:(3,-3,4),(2,-3,4),(0,-1,1):}] , ...

If `A=[{:(3,-3,4),(2,-3,4),(0,-1,1):}]` , then the trace of the matrix `Adj(AdjA)` is

A

`1`

B

`2`

C

`3`

D

`4`

Text Solution

Verified by Experts

The correct Answer is:
A
`(a)` Here `|A|=1`
`implies Adj(AdjA)=|A|^(3-2)*A=A` (where trace of a matrix is the sum of the elements in the principal diagonal)
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