Question

Give the order of the matrix, and identify the given element of the matrix.

10 -11 8 -4
14 13 -8 11; a12

A. 4 × 2; -11

B. 4 × 2; 14

C. 2 × 4; 14

D. 2 × 4; -11

Answer 1

The order of a matrix is its dimensions, expressed as (rows x columns). In this case, we have 2 rows and 4 columns, therefore, the order of the matrix is (2 x 4).

The element a12 means "matrix A, row 1, column 2".
By observation, this is -11.