HP 38g Graphing Calculator User Manual
Page 67
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To define the 1. Display the Symbolic view (|
symb
|). If the highlight is on
expression
an existing expression, scroll to an empty line—unless you
don’t mind writing over the expression. Or, clear one line
(I DEL I) or all lines (■ [CLEAR]).
2. Make sure your function is in the form “y = For example,
given the equation 9x+y - 11=0, you would rearrange it
to y =
f(x)
= -9x + 11. Type in just the expression
(-9x+l 1) for the right side.
• 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(0). The only independent variable in the expression
is
0
.
e For a Sequence definition,
enter the first, second, and
nth terms for U (U1, or...U9, or UO). Define a sequence
function 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.
3. Press I ENTER I or {{OK}} to enter the expression into the list.
All checkmarked expressions mill be plotted.
Plotting and Exploring Functions 3-3