2–8
RPN: The Automatic Memory Stack
File name 33s-English-Manual-040130-Publication(Edition 2).doc Page : 388
Printed Date : 2004/1/30 Size : 13.7 x 21.2 cm
2.
Reusing a number in a calculation.
See appendix B for a comprehensive list of the functions that save
x
in the LAST X
register.
Correcting Mistakes with LAST X
Wrong One–Number Function
If you execute the wrong one–number function, use
¹
Í
to retrieve the
number so you can execute the correct function. (Press
Å
first
if you want to
clear the incorrect result from the stack.)
Since
m
and
º
p
don't cause the stack to drop, you can recover from
these functions in the same manner as from one–number functions.
Example:
Suppose that you had just computed ln 4.7839
×
(3.879
×
10
5
) and wanted to
find its square root, but pressed
#
by mistake. You don't have to start over! To
find the correct result, press
¹
Í ?
.
Mistakes with Two–number Functions
If you make a mistake with a two–number operation, (
Ù
,
Ã
,
¸
,
¯
,
)
,
¹
b
,
º
`
,
'
,
¹
x
,
¹
{
,
m
or
º
p
),
you can correct it by using
¹
Í
and the
inverse
of the two–number
function.
1.
Press
¹
Í
to recover the second number (
x
just before the operation).
2.
Execute the inverse operation. This returns the number that was originally first.
The second number is still in the LAST X register. Then:
If you had used the
wrong function
, press
¹
Í
again to restore
the original stack contents. Now execute the correct function.
If you had used the
wrong second number
, key in the correct one and
execute the function.
If you had used the
wrong first number
, key in the correct first number, press
¹
Í
to recover the second number, and execute the function again. (Press
Å
first
if you want to clear the incorrect result from the stack.)
Содержание 33S
Страница 1: ... HP 33s scientific calculator user s manual H HP Part number F2216A 90020 Printed in China Edition 2 ...
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Страница 137: ...Operations with Complex Numbers 9 7 c Ù Adds L1 L2 L3 Converts vector back to polar form displays r θ ...
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Страница 255: ...Mathematics Programs 15 33 y y x x m n New coordinate system Old coordinate system 0 0 x P u y v θ ...
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