Question

Classify each of the following matrices as a row, a column, a square, a diagonal, a scalar, a unit, an upper traingular, a lower triangular matrix.

`[(2, 0, 0),(3, -1, 0),(-7, 3, 1)]`

Answer 1

Let A = `[(2, 0, 0),(3, -1, 0),(-7, 3, 1)]`

As every element above the diagonal is zero in matrix A.
∴ A is a lower triangular matrix.