\( \mathrm{P} \) If \( A=\left[\begin{array}{cc}3 & -4 \\ 1 & -1\en...

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\( \mathrm{P} \)
If \( A=\left[\begin{array}{cc}3 & -4 \\ 1 & -1\end{array}\right] \), show that \( A-A^{T} \) is a skew-symmetric matrix.
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