Configuring The Cas - HP 39gs Master Manual

C o n f i g u r i n g t h e
C o n f i g u r i n g t h e
In most of the examples which precede this section it was assumed that
the CAS was in its default settings. Two versions of the configuration
screen are shown to the right.
These screens can be accessed within the CAS in a number of ways:
from the
•
HOME
• by pressing
SHIFT MODES
by pressing
• SHIFT SYMB
via the menu entry shown right. This appears as the first
•
CFG
entry on most of the menus within the CAS. The configuration
menu that this accesses is not the same screen as that shown
above.
To ensure that the CAS is in default mode, enter the CAS and press
. This will restore default settings.
CLEAR
Configuration of the CAS can be done in a number of ways and only an
overview will be given here. One method is via the configuration line
( ) at the top of each menu. The line shown right of
CFG
means that the calculator is set to
variable, and you are working in
If you select this option of the menu then you will see the further menu
shown to the right. At the top of this menu is more information about the
current configuration.
The example to the right means that
You are in exact-real mode
R=
Step by step mode is selected
STEP
Polynomials are written with their terms in descending order by exponent

X is the current variable
X
Modular calculations are carried out in Z/13Z (p = 13)
13
You are working in Rigorous mode (that is, using absolute values).
||
C A S
C A S
screen, pressing
SHIFT
within the CAS
within the CAS
exact-real mode
Step by step
SHIFT MODES
CFG R= X S
, that is the current
X
mode.
362
. Now press
SHIFT