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To invert a matrix
To negate each
element
Solving systems of linear equations
Matrices
To divide the two
matrices you created for
the previous example,
press the following keys:
A Q
1
n
2
A Q
You can invert a square matrix in Home view by typing the
matrix (or its variable name) and pressing
. You can also use the INVERSE
SnE
command in the Matrix category of the Math menu.
You can change the sign of each element in a matrix by
pressing
Q
, entering the matrix name, and pressing
E
.
You can use matrices to solve systems of linear equations,
such as the following:
In this example we will use matrices M1 and M2, but you
could use any of the ten matrices available.
1. Open the Matrix
Catalog, clear M1,
choose to create a
vector, and open the
Matrix Editor:
St
[select
M1]
C
E
2x+3y+4z=5
x+y–z=7
4x–y+2z=1
419
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