1.

If 3A=[(-1,2,2),(2,-1,2),(2,2,-1)] then

Answer»

`A A^(T)=A^(T)A=I`
`A A^(T)=A^(T)A=-I`
`A A^(T)=A^(T)A=0`
`A A^(T)=A^(T)A=A`

ANSWER :A


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