HP 49g+, Руководство пользователя, Страница: 60 / 862

Page 2-5
The result will be shown as follows:
To evaluate the expression we can use the EVAL function, as follows:
µ„î`
As in the previous example, you will be asked to approve changing the CAS
setting to
Approx
. Once this is done, you will get the same result as before.
An alternative way to evaluate the expression entered earlier between quotes
is by using the option
…ï .
To recover the expression from the existing
stack, use the following keystrokes:
ƒƒ…ï
We will now enter the expression used above when the calculator is set to the
RPN operating mode. We also set the CAS to
Exact
and the display to
Textbook
. The keystrokes to enter the expression between quotes are the
same used earlier, i.e.,
³5*„Ü1+1/7.5™/
„ÜR3-2Q3`
Resulting in the output
Press
`
once more to keep two copies of the expression available in the
stack for evaluation. We first evaluate the expression using the function
EVAL
,
and next using the function
NUM
. First, evaluate the expression using
function EVAL. The resulting expression is semi-symbolic in the sense that
there are floating-point components to the result, as well as a
√
3. Next, we
switch stack locations and evaluate using function NUM:
™
Exchange stack levels 1 and 2 (the SWAP command)
…ï
Evaluate using function NUM