Hp 49g+ User Manual download pdf (Page 797)

100

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Page C-5

The keystrokes necessary for entering these values in Algebraic mode are the

following: …¹2` R5`

The same calculations can be produced in RPN mode. Stack levels 3: and 4:

show the case of Exact CAS setting (i.e., the _Numeric CAS option is

unselected), while stack levels 1: and 2: show the case in which the Numeric

CAS option is selected.

The required keystrokes are: 2…¹ 5R

A keyboard short cut to toggle between APPROX and EXACT mode is by

holding the right-shift key and pressing the ENTER key simultaneously, i.e.,

‚ (hold) `.

Real numbers vs. integer numbers

CAS operations utilize integer numbers in order to keep full precision in the

calculations. Real numbers are stored in the form of a mantissa and an

exponent, and have limited precision. In APPROX mode, however, whenever

you enter an integer number, it is automatically transformed into a real

number, as illustrated next:

Whenever the calculator lists an integer value followed by a decimal dot, it is

indicating that the integer number has been converted to a real representation.

This will indicate that the number was entered while the CAS was set to

APPROX mode.

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Hp 49g+ User Manual Page 797

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