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.

`[(3, -2, 4),(0, 0, -5),(0, 0, 0)]`

Answer 1

Let A = `[(3, -2, 4),(0, 0, -5),(0, 0, 0)]`

As every element below the diagonal is zero in matrix A.
∴ A is an upper triangular matrix.