•
Case
4:
The
HP-18C
displays:
SOLUTION
NOT
FOUND
This message indicates
that
the
solver
in
unable
to
make
any
progress towards finding a solution.
You
should
check your for-
mula to
make
sure you
have
made
no
errors
in
entering it. Also
check
the
values
of
each
of
the
known
variables.
If
your formula
and
variables are correct, you
may
be
able to find a solution
by
entering very
good
guesses.
Formulas
Used
by
Hp·18C
Menus
The following formulas are
used
to calculate values using
the
HP-18C
menus
and
built-in variables. Variables
that
appear
on
menu
key la-
bels are
not
defined here (for example, %CHANGE, PMT,
1%
YR)
.
Refer to
the
section
of
the
manual
that
covers each
menu
for defini-
tions
of
those variables.
Actuarial Functions
The actuarial formulas describe
the
four actuarial functions included
in
the
formula solver. These formulas are also
used
to simplify
the
time value
of
money
and
cash flow formulas, below.
n
number
of
compounding
periods.
i% periodic interest rate, expressed as a percentage.
Single
Payment
Present
Value Function
(Present value
of
a single $1.00
payment)
(
.
01<
)-n
SPPV (i%:n) = 1 +
~o~
178
B:
More
About
HP-18C
Calculations