HP 39gII User Manual page 40

In Home
Symb view keys
30
3. Highlight F3(X).
=
4. Press
Note how the values
for F1(X) and F2(X)
are substituted into
F3(X).
You can also evaluate any function expression in Home
by entering it into the edit line and pressing
For example, define F4 as below. In Home, type
F4(9)and press E
substituting 9 in place of X in F4.
The following table describes the keys that you use to
work with the Symbolic view.
Key
. This evaluates the expression,
Meaning
Copies the highlighted expression to
the edit line for editing. Press
when done.
Checks/unchecks the current
expression (or set of expressions).
Only checked expression(s) are
evaluated in the Plot and Numeric
views.
Enters the independent variable in the
Function app. Or, you can use
the d key on the keyboard.
Enters the independent variable in the
Parametric app. Or, you can use
the key on the keyboard.
d
.
E
Apps and their views