HP HP-18C - Page 179

Figure 8·5: Numerical Solutions-Case 2
LEFT - RIGHT
--+----i------:: = :-- Estimate
Case 2a:
LEFT - RIGHT have opposite
signs. The two estimates are
"neighbors" .
LEFT - RIGHT
v
--+-------Estimate
Case 2c :
LEFT - RIGHT have the same
sign .
• Case 3: The HP-18C displays:
TRY AGAIN. BAD GUESSES:
LEFT - RIGHT
--+--'---,---- Estimate
~
Case 2b:
LEFT - RIGHT have opposite
signs. The
two estimates are
far apart.
This
indicates that the solver is unable to begin its search for a nu-
merical solution using the current initial estimates (guesses). There
may be a solution you can find by entering different estimates. The
closer you can estimate the answer, the more likely it is that the
solver will find a solution.
B: More About Hp·18C Calculations 177