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 uses 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

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HP 49g manual Selecting Display modes, Explanation of CAS settings