Question

The value of a after this command: a = [0; 0;
1]' *[1 2 3; 4 5 6; 7 8 9]​

Answer 1

Given

$a = [0; 0;1] * [1 \ 2 \ 3; 4 \ 5\ 6\ ; 7\ 8\ 9\ ]$

To find

value of a=?

Solution

When the column matrix [0;0;1] is transposed  It gets the row matrix firstly  $[0;0;1]$ of dimension  1*3, if its multiplied with the matrix of the size$3*3;$

So the value of the multiplication of the matrix $[7\ 8\ 9]$ of the size 1*3

The value of a after the command is $[7,8,9]$