Question

If the following matrix is in the command window M = [5 6 18; 2 4 12; 90 3 2], what number is the command M(1,3) referring to?

a) 18
b) 12
c) 90
d) 3

Answer 1

The command M(1,3) refers to the element in the first row and third column of the matrix M, which is the number 18.

Step-by-step explanation:

The command M(1,3) in a matrix refers to the element located at the first row and third column of matrix M. Given the matrix M = [5 6 18; 2 4 12; 90 3 2], we can locate the element in the first row and third column to find the answer.

If we visualize the matrix, it looks like this:

M = | 5 6 18 |
| 2 4 12 |
|90 3 2 |

From this representation, we can see that the element in the first row and third column is 18.