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Is this the best way
to solve 2 x 2
systems?
Definitely NO!
But, if you've got a
computer (or a graphing calculator) to pop the inverses, it's a
pretty slick way to solve 3 x 3's
and up.
There's one more
important thing that I need to tell you about inverse functions...
It will make more sense now that you know about using them to solve
systems.
|
If the
determinant of a matrix is zero,
then the matrix does NOT have an inverse matrix! |
Check it out:
![A = [ row 1: 1 , 3 row 2: 2 , 6 ]](images/07-matrices-27.gif)
![det A = [ row 1: 1 , 3 row 2: 2 , 6 ]](images/07-matrices-28.gif)
Continued on the
next
page
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