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A is a 3 xx 3 matrix whose elements are ...

A is a `3 xx 3` matrix whose elements are from the set `{ -1, 0, 1}`. Find the number of matrices A such that `tr(AxxA^T) =3`. Where `tr(A)` is the trace of A.

A

572

B

612

C

672

D

682

Text Solution

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The correct Answer is:
C
NA
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