Texas Instruments TI-89 사용자 설명서

Previews

 139

variables are locked automatically.) Finally, unarchive the variable and delete the unused 
variables so that they will not take up memory.

1. From the Home screen, assign variables 

with the following variable types.

Expression: 5 

!x1

Function:

x

2

+4 

!f(x)

List:

{5,10} 

!L1

Matrix:

[30,25] 

!m1

Press " 

M 5 9 X1 ¸ X Z 

2 

« 4 9 j F c X d ¸ 2 [ 

5 

b 10 2 \ 9 j L1 ¸ 2 

g 30 b 25 2 h 9 j M1 ¸

2. Suppose you start to perform an 

operation using a function variable but 
can’t remember its name.

Press 5 

p

3. Display the 

 screen.

This example assumes that the variables 
assigned above are the only ones 
defined.

Press 

2 °

5

…