HP 40G User Manual page 80

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