Texas Instruments TI-89 Manuale Utente

Differential Equation Graphing

 445

Example

Example

Example

Example

For a general solution, use the following syntax. For a particular solution, refer to the 
Technical Reference module.

deSolve(1stOr2ndOrderODE, independentVar, dependentVar)

Using the logistic 1st-order differential equation, find the general solution for y with 
respect to t.

 

•

For maximum accuracy, use 1/1000 instead of .001. A floating-point number can 
introduce round-off errors.

•

This example does not involve graphing, so you can use any Graph mode.

y' = 1/1000 y

ù(100Ny),t,y

Do not use implied multiplication between the 
variable and parentheses. If you do, it will be 
treated as a function call.

For ', type 

2 È

.