User Manual
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.