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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 screen, pressing SHIFT
• by pressing SHIFT MODES within the CAS
• by pressing SHIFT SYMB within the CAS
• via the CFG menu entry shown right. This appears as the first
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
SHIFT MODES. Now press SHIFT
CLEAR
. This will restore default settings.
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
(
CFG) at the top of each menu. The line shown right of CFG R= X S
means that the calculator is set to exact-real mode, that X is the current
variable, and you are working in
Step by step mode.
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
R= You are in exact-real mode
STEP Step by step mode is selected
Polynomials are written with their terms in descending order by exponent
X X is the current variable
13 Modular calculations are carried out in Z/13Z (p = 13)
|| You are working in Rigorous mode (that is, using absolute values).
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