HP 49g+ - Manual (Page 29)

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options above). Unselected options will show no check mark in the
underline preceding the option of interest (e.g., the _Numeric, _Approx,
_Complex, _Verbose, _Step/Step, _Incr Pow options above).
• After having selected and unselected all the options that you want in the
CAS MODES input form, press the @@@OK@@@ soft menu key. This will take you
back to the CALCULATOR MODES input form. To return to normal
calculator display at this point, press the
@@@OK@@@ soft menu key once more.
Explanation of CAS settings
• Indep var: The independent variable for CAS applications. Typically, VX
= ‘X’.
• Modulo: For operations in modular arithmetic this variable holds the
modulus or modulo of the arithmetic ring (see Chapter 5 in the calculator’s
User’s Guide).
• Numeric: If set, the calculator produces a numeric, or floating-point result,
in calculations.
• Approx: If set, Approximate mode used numerical results in calculations. If
unchecked, the CAS is in Exact mode, which produces symbolic results in
algebraic calculations.
• Complex: If set, complex number operations are active. If unchecked the
CAS is in Real mode, i.e., real number calculations are the default. See
Chapter 4 for operations with complex numbers.
• Verbose: If set, provides detailed information in certain CAS operations.
• Step/Step: If set, provides step-by-step results for certain CAS operations.
Useful to see intermediate steps in summations, derivatives, integrals,
polynomial operations (e.g., synthetic division), and matrix operations.
• Incr Pow: Increasing Power, means that, if set, polynomial terms are
shown in increasing order of the powers of the independent variable.
• Rigorous: If set, calculator does not simplify the absolute value function
|X| to X.
• Simp Non-Rational: If set, the calculator will try to simplify non-rational
expressions as much as possible.
Selecting Display modes