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HP 48gx User Manual

HP 48gx
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Lesson
26:
Finding
Roots
Graphically
In
Lesson
17,
you
found
all
of
the
roots
of
a
polynomial
using
the
SOLVE
application.
This
lesson
shows
you
how
to
use
the
special
analytic
tools
in
the
PICTURE
environment
to
find
the
roots
of
a
function
visually
as
well
as
search
for
other
information
about
a
function.
Example:
Plot
the
function,
X°®
+
X* —
5X3
—
2X2
+
X
—
4,
and
find
its
real
roots.
Step
1:
Begin
the
PLOT
application
and
reset
the
plot
display
options.
@
0
@E
FO
ED
RESET
(VM)
0K
TVR
EQ:
PEE
TT
PRN)
INDEP:
H-VIEW:
-5.5
6.5
_AUTOSCALE
Y-VIEW:
-3,1
2.2
ENTER
FUNCTION(S)
TO
PLOT
RESET]
CHLC
[TYPES]
[CAMO]
OK
EB:
Function
:
[IE
ON]
Step
2:
Enter
the
function.
@(EauATon)
PLOT
E
EQ:
" B
f)
rt
or
n
in
INDEP:
¥
H-VIEW:
—56.5
6.5
_HAUTOSCALE
Y-VIEW:-3,1
3.2
EMTER
FUNCTION(S)
TO
PLOT
[E0T
[cHOD:]
OPT:
[ERAZE[
DR]
Step
3:
Erase
the
“blackboard”
(the
PICTURE
display)
and
draw
the
function.
[200M
ci.
[TRACE]
FCNEIT
JEANIL
Plotting
Equations
and
Analyzing
Graphs
6-13

Table of Contents

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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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