User Guide

Chapter 7: Tables 115
Chapter 7:
Tables
Getting Started: Roots of a Function
Getting Started is a fast-paced introduction. Read the chapter for details.
Evaluate the function Y = X
3
N 2X at each integer between L10 and 10. How many sign changes
occur, and at what X values?
1. Press z † † † Í to set
Func graphing
mode.
2. Press o. Press „ 
3 to select
3
. Then
press ¹
2 „ to enter the function Y1=X
3
N2X.
3. Press y - to display the
TABLE SETUP
screen. Press Ì
10 Í to set TblStart=L10.
Press
1 Í to set @Tbl=1.
Press Í to select
Indpnt: Auto (automatically
generated independent values). Press † Í to
select
Depend: Auto (automatically generated
dependent values).
4. Press y 0 to display the table screen.
Note: The message on the entry line, “Press + for
@Tbl” is a reminder that you can change @Tbl from
this table view. The entry line is cleared when you
press any key.
5. Press †until you see the sign changes in the
value of
Y1. How many sign changes occur, and at
what X values?
In this case, you can also see the roots of the
function by finding when Y1=0. You can explore
changes in X by pressing
à to display the @TTbl
prompt, entering a new value, and searching for
your answer.