|
What will happen
if we try to find this guy's inverse?
![[ row 1: 1 , 3 row 2: 2 , 6 | row 1: 1 , 0 row 2: 0 , 1 ]](images/07-matrices-30.gif)
STEP 1:
![-2 times Row 1 ... [ row 1: -2 , -6 row 2: 2 , 6 | row 1: -2 , 0 row 2: 0 , 1 ]](images/07-matrices-31.gif)
|
Row 1 back to
normal
Row 1 +
Row 2 |
![[ row 1: 1 , 3 row 2: 0 , 0 | row 1: 1 , 0 row 2: -2 , 1 ]](images/07-matrices-32.gif) |
Getting zeros in
both spots here means we are dead in the water! No matter
what we try, we won't be able to turn the left side into the
identity matrix.
Hey, do you
remember what happened when the determinant of the coefficient
matrix = 0
when we were solving systems using Cramer's Rule?
Continued on the
next
page
|
The printing
and distribution and/or downloading of these lessons is strictly
prohibited. |
|
