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if A=[(1,-1,1),(1,2,0),(1,3,0)], then |a...

if `A=[(1,-1,1),(1,2,0),(1,3,0)],` then `|adjA|` is equal to

A

`-1`

B

`1`

C

`4`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
B
`|adjA|=|A|^(3-1)=|A|^(2)`
`|A|=|(1,-1,1),(1,2,0),(1,3,0)|=3-2=1`
`implies|adjA|=1`
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