HP 39g+ - Manual (Page 42)

2-2 Aplets and their views
– For a Function
definition, enter an
expression to define
F(X). The only
independent variable
in the expression is
X.
– For a Parametric
definition, enter a
pair of expressions
to define X(T) and
Y(T). The only
independent variable
in the expressions is
T.
– For a Polar
definition, enter an
expression to define
R(
θ
). The only
independent variable
in the expression is
θ
.
– For a Sequence
definition, either:
Enter the first and
second terms for U
(U1, or...U9, or U0).
Define the nth term
of the sequence in
terms of N or of the
prior terms, U(N–1) and U(N–2). The expressions
should produce real-valued sequences with integer
domains.Or define the nth term as a non-recursive
expression in terms of n only. In this case, the
calculator inserts the first two terms based on the
expression that you define.