HP 17bII+ Financial Calculator Bedienungsanleitung PDF herunterladen (Seite 163)

12: The Equation Solver 163

File name : English-M02-1-040308(Print).doc Print data : 2004/3/9

Make sure that the menu for the variables is in the display. (The

equation itself should not be in the display. If it is, press .)

Pressing

now sets NEXT; OLD, A%, B%, and C% to zero.

Variables are also cleared when their equation is edited.

If the SOLVE menu is displayed (rather than the SOLVE CALC

menu), then pressing

will prompt







. Press

, otherwise you will lose the

variables in all the equations. (See “Deleting All Equations or

Variables in the Solver,” page 164.)

Deleting Variables and Equations

Each equation in the Solver list uses calculator memory to store 1) itself,

and 2) its variables.

Deleting a variable is quite different from clearing it:

 Clearing a variable sets it to zero; the variable retains its storage

location in memory. This does not save memory space.

 Deleting a variable erases its value and its storage location. This is a

way to save memory space. If a variable is shared, its value is lost to

all equations that share it. The memory space for a deleted variable is

re-created the next time you use that equation.

An equation that has not been verified (



pressed) does not have any

variables allocated to it. Therefore, it has no variables to be cleared or

deleted.

Not

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HP 17bII+ Financial Calculator Bedienungsanleitung Seite 163