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You've already seen glimpses of
matrices -- determinants (for Cramer's Rule) and Gaussian
elimination... Now, we'll see what else we can do with them.
A matrix is just a rectangular grid
of numbers. Keanu Reeves will tell you otherwise, but don't
believe him.
Here are some examples:
"Matrices" is the
plural of "matrix."
We'll need some
terminology...
![[ row 1: 1 , 3 , 0 row 2: -2 , 6 , 4 ] ... each number is an entry](images/01-matrices-04.gif)
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These are
the rows |
![[ row 1: 1 , 3 , 0 row 2: -2 , 6 , 4 ]](images/01-matrices-05.gif) |
row
1
row 2 |
These are the
columns
![[ column 1: 1 , -2 column 2: 3 , 6 column 3: 0 , 4 ]](images/01-matrices-06.gif)
Continued on the
next
page
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and distribution and/or downloading of these lessons is strictly
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![[ row 1: 1 , 3 , 0 row 2: -2 , 6 , 4 ]](images/01-matrices-01.gif)
![[ row 1: 13 row 2: 2 row 3: -4 ]](images/01-matrices-02.gif)
![[ row 1: 0 , -3 row 2: 2 , 10 ]](images/01-matrices-03.gif)
