Exploring A 3X3 Matrix - Texas Instruments TITANIUM TI-89 User Manual

Exploring a 3x3 Matrix

Exploring a 3x3 Matrix Exploring a 3x3 Matrix Exploring a 3x3 Matrix
Perform these steps to generate a random matrix, augment and find the identity matrix,
and then solve to find an invalid value of the inverse.
1. On the Home screen, use
set the random number generator seed to
the factory default, and then use
to create a random 3x3 matrix
randMat( )
and store it in
2. Replace the
[2,3]
with the variable
function, to augment the 3x3
augment( )
identity to and store the result in
a
3. Use "row reduce" matrix
rref( ) to
The result will have the identity matrix in
the first three columns and
three columns.
Use the cursor in the history area to
Note:
scroll the result.
Activities
RandSeed
.
a
element of the matrix
, and then use the
x
in the last
a^ 1
L
to
.
b
:
b
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