Texas Instruments TI-89 Manuale Utente

Differential Equation Graphing

 448

 When you see this or any other error message:

•

For your order of equation, use the previous table to find the valid Fields settings. 
Change to the applicable setting.

•

For a particular Fields setting, check the following for information that applies to that 
setting.

2nd-order
(system of two 1st-order equations)

DIRFLD or FLDOFF

3rd- or higher-order
(system of three or more 1st-order equations)

FLDOFF

Because 

 is the default 

setting, a common error message is shown to 
the right.