Exploring A Matrix - Texas Instruments TI-89 Titanium Short User Manual

8. Multiply both sides of the equation by
9. Take the square root of both sides of the
equation with the constraint that
and
b>0 x>0
10. Solve for
x
and then dividing by
Note: This is only one of the two general
quadratic solutions due to the constraint in
step 9.

Exploring a Matrix

This activity shows you how to perform several matrix operations.
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
the random number generator seed to the
factory default, and then use
create a random 3x3 matrix and store it in
2. Replace the
with the variable
augment( )
identity to
92
.
by subtracting
b
.
2a
RandSeed
element of the matrix
[2,3]
, and then use the
x
function, to augment the 3x3
and store the result in
a
2.
4a
and
a>0
from both sides
to set
to
randMat( )
a
.
b
.
Activities