HP 50G, User Manual

Page: 64 / 887

Page 2-4
The resulting expression is:
5.*(1.+1./7.5)/( √ 3.-2.^3).
Press
`
to get the expression in the display as follows:
Notice that, if your CAS is set to EXACT (see Appendix C) and you enter your
expression using integer numbers for integer values, the result is a symbolic
quantity, e.g.,
5*„Ü1+1/7.5™/
„ÜR3-2Q3
Before producing a result, you will be asked to change to Approximate mode.
Accept the change to get the following result (shown in Fix decimal mode with
three decimal places – see Chapter 1):
In this case, when the expression is entered directly into the stack. As soon as
you press
`
,
the calculator will attempt to calculate a value for the
expression. If the expression is entered between quotes, however, the calculator
will reproduce the expression as entered. In the following example, we enter
the same expression as above, but using quotes. For this case we set the
operating mode to Algebraic, the CAS mode to Exact (deselect
_Approx ), and
the display setting to Textbook. The keystrokes to enter the expression are the
following:
³5*„Ü1+1/7.5™/
„ÜR3-2Q3`
The result will be shown as follows: