SOLUTION: 1) R3 = 4r2 + r3 -7 -5 -1 | -10 6 -2 9 | 5 0 -26 2 | 28 2) Find the value of the determinant. | 6 1 6 | | 3 1 1 | | 4 2 2 | 3) Find the value of the determinant

Algebra ->  Matrices-and-determiminant -> SOLUTION: 1) R3 = 4r2 + r3 -7 -5 -1 | -10 6 -2 9 | 5 0 -26 2 | 28 2) Find the value of the determinant. | 6 1 6 | | 3 1 1 | | 4 2 2 | 3) Find the value of the determinant      Log On


   

Question 995995: 1) R3 = 4r2 + r3
-7 -5 -1 | -10
6 -2 9 | 5
0 -26 2 | 28
2) Find the value of the determinant.
| 6 1 6 |
| 3 1 1 |
| 4 2 2 |
3) Find the value of the determinant.
| -4 1 -5 |
| -2 -4-2 |
| -4 2 -3 |
4)solve the system of equations using matrices (row operations). If the system has no soluation say that it is inconsistent.
{5x + 3y = -19
{2x + 6y = 2
5)solve the system of equations using matrices (row operations). If the system has no soluation say that it is inconsistent.
{9x - 4y -z = 13
{x + 3y -6z = -26
{8x + y + z = 43
Answer by ikleyn(52788) About Me  (Show Source):
You can put this solution on YOUR website!
.
To solve the problems  2)  and  3)  of your list,  read the lessons

    - Determinant of a 3x3 matrix
    - Co-factoring the determinant of a 3x3 matrix

in this site.  Then make the calculations yourself.


We are here not for making calculations instead of you.

We are here to teach you.