D17
RCL
fl
D18
RCLx
F
D19
RCLx
H
D20 -
(AxExT)
+
(DxHxQ
+
(GxFxB)
-
(GxExQ
-
(AxFxH).
D21
RCL
D
D22
RCLx
B
D23
RCLx
I
D24 -
(AxExI)
+
(DxHxQ
+
(GxFxB)
-
(GxExQ
-
(AxFxH)
-
(DxBxT).
D25
RTN
Returns to the calling program or to
PRGM
TOP.
Bytes
and
Checksum: 037.5, 152E
Flags
Used:
None.
Memory
Required: 348 bytes: 212 for program, 136 for variables.
Program
Instructions:
1. Key in the program routines; press [c] when done.
2. Press
IXEQI
A to input coefficients of matrix
and
column vector.
3. Key in coefficient or vector value
(A
through
L)
at each prompt
and
press IR/s I.
4. Optional: press IxeqI Dto compute determinant of 3 x 3 system.
5. Press I
XEQ
11 to compute inverse of 3 x 3 matrix.
6. Optional: press Ixeq IA and repeatedly press IR/s Ito review the
values
of
the
inverted
matrix.
7. Press Ixeq IMto multiply the inverted matrix by the column vec
tor
and
to
see
the
value
of
X.
Press
I
R/s
Ito
see
the
value
of
Y,
then press IR/SI again to see the value of Z.
8. For a
new
case, go back to step 2.
188
12:
Mathematics
Programs
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