Classify the following matrices as a row, a column, a square, a d… - Vidyadip

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 :

$\left[\begin{array}{lll}3 & 0 & 0 \\ 0 & 5 & 0 \\ 0 & 0 & \frac{1}{3}\end{array}\right]$

✓

Answer

Let $A=\left[\begin{array}{lll}3 & 0 & 0 \\ 0 & 5 & 0 \\ 0 & 0 & \frac{1}{3}\end{array}\right]$

As matrix A has all its non-diagonal elements zero. ∴ A is a diagonal matrix.

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