19990401
u
Matrix Inversion
[OPTN]
-
[MAT]
-
[
x
–1
]
Example
To invert the following matrix :
Matrix A =
1
2
3
4
K
2
(MAT)
b
(Mat)
av
(A)
!
)
(
x
–1
)
w
u
Squaring a Matrix
[OPTN]
-
[MAT]
-
[
x
2
]
Example
To square the following matrix :
Matrix A =
1
2
3
4
K
2
(MAT)
b
(Mat)
av
(A)
xw
2-8-19
Matrix Calculations
# Only square matrices (same number of rows
and columns) can be inverted. Trying to invert
a matrix that is not square produces an error.
# A matrix with a determinant of zero cannot be
inverted. Trying to invert a matrix with
determinant of zero produces an error.
# Calculation precision is affected for matrices
whose determinant is near zero.
# A matrix being inverted must satisfy the
conditions shown below.
The following shows the formula used to
invert Matrix A into inverse matrix A
–1
.
A A
–1
= A
–1
A = E =
1 0
0 1
A =
a b
c d
Note that ad – bc
G
0.
A
–1
=
1
ad – bc
d –b
–c a
Summary of Contents for ALGEBRA FX 2.0
Page 1: ... ALGEBRA FX 2 0 User s Guide ...
Page 19: ...19990401 ALGEBRA FX 2 0 ...
Page 26: ...19990401 1 1 Keys 1 1 1 Keys REPLAY COPY PASTE CAT CAL H COPY PRGM List Mat i ...
Page 122: ...19990401 ...
Page 280: ...19990401 ...
Page 310: ...19990401 ...
Page 358: ...19990401 8 8 2 Program Library egcw w ww w ...
Page 360: ...19990401 8 8 4 Program Library Example 1 Example 2 fw baw bf w fw baw ca w ...
Page 362: ...19990401 8 8 6 Program Library ...
Page 364: ...19990401 8 8 8 Program Library dw fcde wfcde wfcde fcde w daw w ...
Page 366: ...19990401 8 8 10 Program Library b awaw bwaw aw9d w ...
Page 423: ...19981001 MEMO ...
Page 424: ...19981001 MEMO ...
Page 425: ...19981001 MEMO ...