Texas Instruments TITANIUM TI-89 User Manual

Page 139

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139

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

Steps and keystrokes

Display

1. From the Home screen, assign variables

with the following variable types.

Expression: 5

!x1

Function:

!f(x)

List:

{5,10}

!L1

Matrix:

[30,25]

!m1

Press "

M 5 9 X1 ¸ X Z

« 4 9 j F c X d ¸ 2 [

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

3. Display the

VAR-LINK

screen.

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

Press

2 °

…