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HP 48gx User Manual

HP 48gx
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Lesson
9:
Arithmetic
with
Symbols
Arithmetic
using
symbolic
variables
is
very
much
like
arithmetic
using
numbers.
You
can
make
symbolic
calculations
on
the stack
the
same
way
you
make
numeric
calculations—except
you
use
algebraic
objects
(and
tick-mark
delimiters)
instead
of
just
numbers.
—axr
Example:
Use
symbolic
math
to
create
the
equation
y
=
1
—e¢
Step
1:
Enter
y
and
the
number
1.
CLEAR)
:
O@@Y
ETE
|
EER)
|
Step
2:
Enter
the
argument
—az.
DOPE
®D@X
:
=
L
THATIEHAT]
*@
[30m]
|
[APPLY]
Step
3:
Calculate
e=9%,
J:
1
ct
1
1:
ERP
-a%w)
FETT
EE
NE
El
I
CT
Step
4:
Subtract
to calculate
1
e=%%.
(3)
2
1,1!
I:
1-ERP
(=a)
[+HAT[4HAT]
#0
[*#@w]
|
[RPPLY|
Step
5:
Form
an
equation
from
the
two
expressions.
&=)
2
1:
'y=1-ExP(-a%u)’
ETEETL
EE
ETT
EO
CT
Arithmetic
3-9

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HP 48gx Specifications

General IconGeneral
ModelHP 48gx
TypeGraphing Calculator
Display TypeLCD
Display Size131x64 pixels
Memory128 KB RAM
Expandable MemoryYes, via expansion cards
Release Year1993
ProcessorSaturn
Programming LanguageRPL
Power Supply3x AAA batteries
Weight255 g (9 ounces)

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