A square matrix is said to be symmetric if \( A^{\prime} \) is \( \...

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A square matrix is said to be symmetric if \( A^{\prime} \) is
\( \mathrm{P} \)
equal to
W
(1) \( -A \)
(2) \( A \)
(3) \( A^{2} \)
(4) \( I \)
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