Question
Classify the following matrices as a row, a column, a square, a diagonal, a scalar, a unit, an upper triangular, a lower triangular, a symmetric or a skew- symmetric matrix :
$\left[\begin{array}{c}5 \\ 4 \\ -3\end{array}\right]$
$\left[\begin{array}{c}5 \\ 4 \\ -3\end{array}\right]$
∴ As matrix A has only one column. ∴ A is a column matrix.
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$\left[\begin{array}{lll}9 & \sqrt{2} & -3\end{array}\right]$
$A=\left[\begin{array}{cc}1 & 3 \\ -4 & 5\end{array}\right]$