Texas Instruments TI-89 Titanium User Manual page 656

Saving Equations for Future Use
Because the number of equations that you can recall with ‡
equation may not be retained indefinitely.
To store the current equation for future use,
save it to a variable.
1. From the Numeric Solver screen, press
, and select
2. Specify a folder and a variable name for
the equation.
3. Press ¸ twice.
An equation variable has an EXPR data type, as shown on the MEMORY and
Note:
VAR-LINK screens.
Opening a Saved Equation
To open a previously saved equation variable:
1. From the Numeric Solver screen, press
, and select
Numeric Solver
.
2:Save Copy As
.
1:Open
is limited, a particular
Eqns
653