Texas Instruments TI-89 사용자 설명서

Previews

Expanding Expressions

Reducing Expressions

Steps and keystrokes

Display

Expand the expression (xN5)

. You can enter

“expand” on the entry line by typing

EXPAND

on the keyboard, or by pressing

„ and

selecting

3:expand(

Press

„ 3 c X | 5 d Z 3 d ¸

(Optional) Enter other expressions on your
own.

Steps and keystrokes

Display

Reduce the expression (x

N2xN5)/(xN1) to its

simplest form. You can enter “propFrac” on
the entry line by typing

PROPFRAC

on the

keyboard, or by pressing

„ and selecting

7:propFrac(

Press

„ 7 c X Z 2 | 2 X | 5 d e c X |

d d ¸