HP 39gII - Page 138

128 Sequence app
Open the
Sequence app
1. Open the Sequence app.
ISelect
Sequence
The Sequence app
starts in the Symbolic view.
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 app, highlight
the U
1(1) field and begin defining your sequence.
1
E1E
+
E
Note: You can use the
, , , and menu keys to
assist in the entry of expressions.
Set up the plot 3. In Plot Setup, set the SEQPLOT option to Stairstep
and reset the default plot settings by clearing the Plot
Setup view.
SSETUP-PLOT
SCLEAR
\>8E
>
8E
U
1
1=
U
2
1=
U
n
U
n 1–
U
n 2–
+=
n 2>