If A and B are skew-symmetric matrices of same order, then \( AB' + BA' \) is a/an :
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For any two matrices \( A \) and \( B \), an expression of the form \( XY + YX \) where \( X=A \) and \( Y=B' \) retains its structure under transpose because the reversal law swaps the multiplication order, mirroring the terms back into themselves.