HP HP-18C - Page 177

Figure B-2. Numerical Solutions-Case 1
LEFT - RIGHT
~
--t---~ E*:- -- Estimate
Case 1a:
LEFT - RIGHT is exactly
O.
LEFT-RIGHT
8
_-t- __ ----..""7 ___ Estimate
Case 1b:
LEFT
-RIGHT is not exactly O.
LEFT and RIGHT are rela-
tively close together. The
two
estimates are "neighbors".
If you want to know whether LEFT - RIGHT is exactly 0, press the
menu key for the unknown variable. If LEFT - RIGHT is not equal
to 0, the HP -18C displays the values of LEFT and RIGHT on lines
1
and 2.
Figure B-3. Displaying LEFT and RIGHT For a Numerical
Solution
LEFT :79.9999999999
RIGHT: 80. 0000000000
AP1=9.46
~1l:lliII
The formula could have more than one numerical solution. If the
answer does not seem reasonable, you should enter one or two
guesses
and restart the search .
• Case 2: The HP-18C displays an answer on line 3 and automati-
cally displays the values of LEFT and RIGHT on lines 1 and 2. The
answer on line 3 could be a solution for the variable. If LEFT and
RIGHT are relatively close to one another in value, the answer is
probably a
solution . Otherwise, the answer is probably not a
solution.
B: More About HP-18C Calculations 175