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adj- [{:( 1,0,2),(-1,1,-2),(0,2,1):}]=[{...

adj- `[{:( 1,0,2),(-1,1,-2),(0,2,1):}]=[{:(5,a,-2),(1,1,0),(-2,-2,b):}]`, then [a, b] is equal to-

A

`[-4 1]`

B

`[-4 -1]`

C

`[4 1]`

D

`[4-1]`

Text Solution

Verified by Experts

The correct Answer is:
3
`(Adj A)_(12)= C_(21)= "cofactor of" a_(21)=- |{:(0,2),(2,1):}| =4`
`(Adj A)_(33)= C_(33)= "cofactor of" a_(33)= + |{:(1,0),(-1,1):}| =1`
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