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Examples: Defining Expressions
Function
Example
Define - 2x + 3 .
Enter this expression as the right side of the equation in the
Symbolic view.
In the Symbolic view of the Function aplet, highlight a line (or
clear the lines) and enter the expression.
I LIB I Select Function.
{{START}}
{{X}} [ID 3 □ 2 0 {{X}} 0
3 I ENTER I
g FUNCTION SVMeOLIC VIEM^H
*'FKX>=X''3-2*X+3
F3CX)=
F4<:x>=
F5<X>=
i—HBnnniiUYIB
Remember that the equation that the HP 38G evaluates must
be in the form /(x) = expression in terms of x.
Given this
exoression...
Rearrange it
to...
And enter...
3x + 2y - 4 = 0 y= -3/2x + 2
-3/2*X+2
x^ + 7x+10 = 0 y = x' + 7x+]0
X''2 + 7*X+10
x^ = 2x+7
y^ = 2x+7
y3 = y, -Y2
FI (X)=X''2,
F2(X)=2*X+7,and
F3(X)=F1 (X) -F2(X)
Parametric Define xQf) = 3 sinSi
Example y(i) = 2 sin4i.
In the Symbolic view of the Parametric aplet, highlight a line
(or clear the lines) and enter the expressions.
1 LIB I Select Parametric
{{START}}
3 0 I SIN I 3 0 {{T}} I ENTER I
2 0 I SIN I 4 0 {{T}} I ENTER I
*FSR*METIilC SVHSnyC MIEW*
^X1<T)=3*SINC3*T>
''Yl(T>=2*SINC4sT)
Y2<T>=
X3<T)=
BMEEaanii
w
iHiiiiBiranB
3-6 Plotting and Exploring Functions