- #1
Surreal Ike
- 24
- 0
I found this odd question in the back of the chapter supplement. I don't need to do it for homework and it probably won't be on the test but the fact that I don't know how to do the problem frustrates me.
Here it is:
* * *
Use the fact that 21,375, 38,798, 34,162, 40,223, and 79,154 are all divisible by 19 to show that
| 2 1 3 7 5 |
| 3 8 7 9 8 |
| 3 4 1 6 2 |
| 4 0 2 2 3 |
| 7 9 1 5 4 |
is divisible by 19 without directly evaluating the determinant.
* * *
It wasn't too hard to notice that the digits of the numbers given were also the digits you get from reading off the numbers in the rows... but this seems like a very superficial relationship!
Here it is:
* * *
Use the fact that 21,375, 38,798, 34,162, 40,223, and 79,154 are all divisible by 19 to show that
| 2 1 3 7 5 |
| 3 8 7 9 8 |
| 3 4 1 6 2 |
| 4 0 2 2 3 |
| 7 9 1 5 4 |
is divisible by 19 without directly evaluating the determinant.
* * *
It wasn't too hard to notice that the digits of the numbers given were also the digits you get from reading off the numbers in the rows... but this seems like a very superficial relationship!