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HP 48G Series User Manual

HP 48G Series
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To
decide
which
case
it
is,
you
should
find
the value
of
the
expression
at
the
Sign
Reversal
point.
Example:
Find
the
value
of
the
expression
at
the
computed
value
of
z
in
order
to
decide
whether
it
is
a
solution
to
RATFUNC
or
represents
the
location
of
a
discontinuity.
Step
1:
Press
(A)
to
move
the
highlight
to
the
Efi:
field
and
press
EuFR=.
The
value
of
the
expression
at
the
computed
value
of
z
1s
returned
to
the
stack.
Step
2:
Return
to
the
stack
to
view
the value
of
the
expression
(labeled
Expt).
:
1.5
wi
-3.
ABRAREEARHT
Eup:
133339933903
I
I
Because
the
value
of
the
expression
is
not
close
to
zero,
in
all
likelihood,
there
is
a
discontinuity
at
#
=
—3.
(You
can
confirm
this
by
substituting
-3
into
the
original
equation
and
observing
that
it
generates
denominators
equal
to
zero—a
sign
of a
potential
discontinuity.)
In
general,
whenever
you
expect
multiple
solutions,
you'll
probably
save
yourself
some
time
and
effort
by
plotting
the
expression
and
using
the
graphical
analysis
tools
instead
of
the
SOLVE
application
(see
lesson
26
for
an
example).
Press
((2)(SOLVE)
ik
to
return
to
the
SOLVE
application
and
try
solving
another
equation—this
time
keying
it
in
yourself.
Example:
Find
the
measure
(in
degrees)
of
the
largest
angle
in
a
triangle
with
sides
of
4, 7,
and
9,
with
6
as
the
largest
angle
and
c
as
the
largest
side).
Use
the
Law
of
Cosines:
c?
=a”
+
b%
—
2abcosb
Solving
Equations
5-5

Table of Contents

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Preview: User Guide
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Preview: Advanced User's Reference Manual
Advanced User's Reference Manual764 pages

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HP 48G Series Specifications

General IconGeneral
ModelHP 48G Series
TypeGraphing Calculator
Display TypeLCD
Display Size131x64 pixels
Programming LanguageRPL (Reverse Polish Lisp)
Memory32 KB RAM
ProcessorSaturn
Power Supply3x AAA batteries
ConnectivityInfrared (IR)

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