Q.What is meant by Matrices ?

A matrix is a rectangular array of numbers arranged in rows and columns, written within brackets, of order (number of rows × number of columns).

A matrix is a rectangular array of numbers (elements) arranged in horizontal rows and vertical columns, enclosed within square brackets [ ] or parentheses ( ).

Key points:

• A matrix having m rows and n columns is of order m × n (read as "m by n").
• Each number in the matrix is called an element.
• Example: a matrix with 2 rows and 3 columns is a 2 × 3 matrix.
• Special types include a row matrix, a column matrix, a square matrix (rows = columns), and an identity matrix. …