HP 17bII manual More About Calculations

restart the search.

!Case 2: The calculator displays the values of LEFT and RIGHT, which

are unequal. To see the calculator’s result, press <or C. If LEFT and RIGHT are relatively close to one another in value, the result is probably a true solution. Otherwise, the result is probably not a true solution.

If the result seems unreasonable, it could be because the equation has more than one solution. You might want to enter one or two guesses and restart the search.

If you want to obtain additional information about the answer, press and hold down the menu key for the unknown variable until the numbers in the display stop changing. At this point, the Solver is displaying the final estimates and the signs of LEFT－RIGHT for each estimate.

This information can be helpful:

!Case 2a: If the signs of LEFT－RIGHT are opposite, and the two estimates are as close together as two 12-digit numbers can get (neighbors), the Solver found two estimates that “bracket” an ideal solution (a solution where LEFT－RIGHT equals zero). If LEFT and RIGHT are relatively close together, the answer is probably a solution.

!Case 2b: If the signs of LEFT－RIGHT are opposite, and the two estimates are not neighbors, be very cautious about accepting the answer as a solution. If LEFT and RIGHT are relatively close together, the answer is probably a solution.

!Case 2c: If LEFT－RIGHT for the two estimates have the same sign, the Solver has halted because it could find no estimates that further reduced the magnitude of LEFT－RIGHT. Be very cautious about accepting the answer. If the values of LEFT and RIGHT are not relatively close to one another, you should reject the answer.

244 B: More About Calculations

File name : 17BII-Plus-Manual-E-PRINT-030709 Print data : 2003/7/11