Define the expression, Specify plot settings – HP 39g+ User Manual
Page 80
6-2
Sequence aplet
Define the
expression
2. Define the Fibonacci sequence, in which each term (after
the first two) is the sum of the preceding two terms:
,
,
for
.
In the Symbolic view of the Sequence aplet, highlight the
U
1
(1) field and begin defining your sequence.
1
>(17(5@ 1 >(17(5@
V ÃbI dÃ
>@
V
bI!dÃ
Note: You can use the
I
,
V
, and
V!Ã
menu
keys to assist in the entry
of equations.
>(17(5@
Specify plot
settings
3. In Plot Setup, first set the
SEQPLOT
option to
Stairstep
. Reset the default plot settings by clearing
the Plot Setup view.
–
A Stairsteps graph plots n on the horizontal axis and
U
n
on the vertical axis.
–
A Cobweb graph plots U
n-1
on the horizontal axis
and U
n
on the vertical axis.
>6+,)7@
SETUP
-
PLOT
>6+,)7@
CLEAR
*e, *A, 8 >(17(5@
*A, 8 >(17(5@
U
1
1
=
U
2
1
=
U
n
U
n
1
–
U
n
2
–
+
=
n
3
>