Texas Instruments TI-89 사용자 설명서

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10. To select an initial condition interactively, 

press:

2 Š 
When prompted, enter t=40 and y1=45.

When selecting an initial condition 
interactively, you can specify a value for t 
other than the t

0

 value entered in the 

 or 

.

Instead of entering 

 and 

 after pressing 

2 Š
you can move the cursor to a point on the 
screen and then press 

¸.

You can use 

… to trace curves for initial 

conditions specified in the 

. 

However, you cannot trace the curve for 
an initial condition selected interactively.

Press 

2 Š 40 ¸ 45 ¸