Texas Instruments TI-89 Voyage 200, User Manual

Page: 367 / 1008

Sequence Graphing 367
6. On the Window Editor, change the Window variables.
8. Press
…
. As you press
B
, the trace cursor follows the web. The screen displays the
cursor coordinates nc, xc, and yc (where xc and yc represent
u(n
N
1)
and
u(n)
,
respectively).
As you trace to larger values of nc, you can see xc and yc approach the convergence
point.
Note:
When the nc value changes, the cursor is on the sequence. The next time you
press
B
, nc stays the same but the cursor is now on the
y=x
reference line.
nmin=1
nmax=25
plotstrt=1
plotstep=1
xmin= L 10
xmax=10
xscl=1
ymin= L 10
ymax=10
yscl=1
7. Regraph the sequence.
Web plots are always shown as
lines, regardless of the selected
display style.
Note:
During a trace, you can
move the cursor to a specified n
value by typing the value and
pressing
¸
.
u(n
N
1)
u(n)
y= L .8x + 3.6
y=x