Step & Key Operation
(When using EL-9600)
*Use either pen touch or cursor to operate.
Display
(When using EL-9600)
Notes
EL-9600 Graphing Calculator
3
-
3
3
-
1
Delete the input matrices for future
use.
The 1 is the
x
coordinate, 2 the
y
coordinate, and the 3 the
z
coor-
dinate of the solution point.
(
x
,
y
,
z
)=(1, 2, 3)
The system of equations can be
expressed as
Enter the constants on the right side
of the equal sign into matrix C (3
x
1).
○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
2
-
1
Enter a 3
x
3 matrix B.
2
-
2
Some square matrices have no
inverse and will generate error
statements when calculating the
inverse.
Exit the matrix editor and find the
inverse of the square matrix B.
6-2
○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
*
*
*
*
(repeatedly)
*
*
*
*
The calculator can execute calculation of inverse matrix and matrix
multiplication. A system of linear equations can be solved easily using the
Matrix feature.
- 0.17 0.83 - 0.5
0.5 - 0.5 0.5
0.17 0.17 - 0.5
B
-1
=
*
*
*
*
3
-
2
x
y
z
1 2 1
2 1 -1
1 1 -2
8
1
-3
=
Let each matrix B, X, C :
BX = C
B
-1
BX = B
-1
C (multiply both
sides by B
-1
)
I = B
-1
(B
-1
B = I, identity matrix)
X = B
-1
C
Calculate B
-1
C.
MATRIX
MATRIX
MATRIX
MATRIX
MATRIX
2
3
3
1
2
2
1
1
1
1
1
2
A
2
B
3
3
1
8
1
3
A
2
A
3
C
2
2nd F
QUIT
2nd F
OPTION
2nd F
ENTER
ENTER
x
-1
X
CL
ENTER
ENTER
ENTER
ENTER
ENTER
ENTER
ENTER
ENTER
ENTER
ENTER
ENTER
ENTER
ENTER
ENTER
ENTER
ENTER
ENTER
CL
2nd F
2nd F
x
-1
QUIT
(
-
)
(
-
)
(
-
)
B
HB1.DocB.
98.10.1, 11:34 AM
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