222 Chapter 13: Tables
13TABLES.DOC TI-89/TI-92 Plus: Tables (English) Susan Gullord Revised: 02/23/01 1:08 PM Printed: 02/23/01 2:16 PM Page 222 of 10
Steps
³
TI-89
Keystrokes
›
TI-92 Plus
Keystrokes Display
1. Display the
MODE dialog box.
For the Graph mode, select
FUNCTION.
3
B1
¸
3
B1
¸
2. Display and clear the Y= Editor.
Then define y1(x) = x3 – 2x.
¥#
ƒ8¸
¸
XZ3|2X
¸
¥#
ƒ8¸
¸
XZ3|2X
¸
3. Set the table parameters to:
tblStart = ë10
@tbl = 1
Graph < - > Table = OFF
Independent = AUTO
¥&
·10
D1
DB1
DB1¸
¥&
·10
D1
DB1
DB1¸
4. Display the Table screen. ¥' ¥'
5. Scroll through the table. Notice
that y1 changes sign at x = ë1, 1,
and 2.
To scroll one page at a time, use
2D
and
2C
.
Dand C
as necessary
D and C
as necessary
6. Zoom in on the sign change
between x = ë2 and x = ë1 by
changing the table parameters
to:
tblStart = ë2
@tbl = .1
„
·2
D.1
¸¸
„
·2
D.1
¸¸
Preview of Tables
Evaluate the function y=x3ì2x at each integer between ë10 and 10. How many sign
changes are there, and where do they occur?