Casio fx-9860GII User Manual

Using a graphic display calculator
© Oxford University Press 2012: this may be reproduced for class use solely for the purchaser’s institute
Casio fx-9860GII
Type the coeffi cients from the three equations into the
matrix, pressing
after each number.
Press
EXE
.
The reduced row echelon form gives the solutions to the equations
of the line if the fi nal row of the matrix is all zeroes.
The solutions are equivalent to
xz+=−
3
7
2
and
yz+=
2
7
3
In this example, the solutions represent a straight line.
The equations of the line can be written
72
3
73
2
()()xy
z
+
−
−
−
==
xy z+−
−
==
2
3
3
27
Example 7
Solve the equations x + 2y − 3z = 13
2x − y + x = 4
x + 2y − 3z = 7
Press
MENU
. You will see the dialog box as shown on the right.
Choose A: EQUA and press
EXE
.
From the menu, choose Simultaneous and press
F1
.
Choose equations in three unknowns and press
F2
.
You will see the template on the right.
Type the coeffi cients from the three equations into the template,
pressing
EXE
after each number.
Press
F1
and the calculator will solve the equations,
giving the solutions as X, Y and Z.
If there are previous
equations in the memory,
press
EXIT
until you return
to this menu.
The equations must be in
the correct order.
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Casio fx-9860GII Specifications

General

Type	Graphing
Form factor	Desktop
Control type	Buttons
Product color	Silver
Housing material	Plastic
Built-in capability	Yes
Digits	- digits
Display type	LCD
Second display	No
Display tilting	-
Display resolution	64 x 128 pixels
Display character size	8 x 21 mm
Display number of lines	8 lines
Display number of characters	21
Flash memory	1.5 MB
RAM capacity	0.064 MB
Storage media type	Flash
Battery type	AAA
Power source	Battery
Number of batteries supported	4