6-12 Sequence Graphing
8306SEQN.DOC TI-83 international English Bob Fedorisko Revised: 02/19/01 12:22 PM Printed: 02/19/01 1:36
PM Page 12 of 16
1. Press o in Seq mode to display the sequence Y= editor.
Make sure the graph style is set to í (dot), and then
define
n
Min, u(
n
) and u(
n
Min) as shown below.
2. Press y [FORMAT] Í to set Time axes format.
3. Press p and set the variables as shown below.
n
Min=1 Xmin=0 Ymin=L10
n
Max=25 Xmax=25 Ymax=10
PlotStart=1 Xscl=1 Yscl=1
PlotStep=1
4. Press s to graph the sequence.
5. Press y [FORMAT] and select the Web axes setting.
6. Press p and change the variables below.
Xmin=L10 Xmax=10
7. Press s to graph the sequence.
8. Press r, and then press ~ to draw the web. The
displayed cursor coordinates
n
, X (u(
n
N1)), and
Y (u(
n
)) change accordingly. When you press ~, a new
n
value is displayed, and the trace cursor is on the
sequence. When you press ~ again, the
n
value remains
the same, and the cursor moves to the y=x reference line.
This pattern repeats as you trace the web.
Using Web Plots to Illustrate ConvergenceExample:
Convergence