HP 38g Graphing Calculator - Manual (Page 103)

Numeric View
Keys
Key Meaning
{{EDIT}} Copies the highlighted value to the edit line
for editing. Press {{OK}} when done.
{{INFO}} Displays a message about the solution (see
"Interpreting Results," next page).
{{PAGE}} Displays other pages of variables, if any.
{{DEFN}} Displays the current, defining expression.
Press
{{OK}} when done.
{{SOLVE}} Finds the solution for the highlighted
variable.
Clears highlighted variable to zero or deletes
current character in edit line, if edit line was
active.
m [CLEAR] Resets all variables’ values to zero or clears
the edit line, if cursor was in edit line.
Using an Initial You can obtain a faster and possibly more accurate solution if
Guess you supply an estimated value for the unknown variable
before pressing {{ solve }}. Solve will look for a solution near
the initial guess first.
• An initial guess is especially important in the case of a
repeating, non-linear curve that could have more than one
solution.
• Plot the equation to help you select an initial guess when
you don't know in which range to look for the solution.
Number You can change the number format for the Solve aplet in the
Format Numeric Setup view. The options are the same as in Home
MODES: Standard, Fixed, Scientific, and Engineering. For the
latter three, you also specify how many digits of accuracy you
want. See "Display Modes", in chapter 1 for more information.
You might find it handy to set a different number format for
the Solve aplet if, for example, you define equations to solve
for the time value of money. A Number Format of Fixed 2
would be appropriate in this case to handle monetary values.
Solve 4-5