If \(A=\begin{bmatrix}0&l&-3\\-2&0&1\\m&-1&0\end{bmatrix}\) is a skew symmetric matrix, then
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → \(l=2, m = 3\)
In a skew symmetric matrix, \(a_{ij} = -a_{ji}\) for every i and j.
\(a_{12} = -a_{21}:\quad l = -(-2) = 2\)
\(a_{31} = -a_{13}:\quad m = -(-3) = 3\)
The remaining pair also fits: \(a_{23} = 1\) and \(a_{32} = -1\).