HP 39gII

Apps and their views 29
– For a Sequence
definition, either
enter the first term,
or the first and
second terms for U.
Then define the nth
term of the
sequence in terms of N or the prior terms, U(N–1)
and/or 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.
– Note: you will have to enter the second term if the
HP 39gII is unable to calculate it automatically.
Typically if Ux(N) depends on Ux(N–2) then you
must enter Ux(2).
Evaluating expressions
In apps In the Symbolic view, a variable is a symbol only, and
does not represent one specific value. To evaluate a
function in Symbolic view, press . If a function calls
another function, then resolves all references to
other functions in terms of their independent variable.
1. Choose the Function
app.
I
Select Function
2. Enter the expressions in the Function app’s Symbolic
view.
AAs
j
A
B
AF1lm+
A
F2 lm