HP 39gII

Function app 49
3
Function app
About the Function app
The Function app enables you to explore up to 10 real-
valued, rectangular functions y in terms of x. For
example, and .
Once you have defined a function you can:
• create graphs to find roots, intercepts, slope, signed
area, and extrema
• create tables to evaluate functions at particular values
This chapter demonstrates the basic tools of the Function
app by stepping you through an example.
Getting started with the Function app
Throughout this chapter, we will use an example
involving two functions: a linear, , and a
quadratic, .
Open the
Function app
1. Open the Function app.
ISelect
Function
The Function app starts in the Symbolic view.
The Symbolic view is the defining view for the
Function app. The other views are derived from any
symbolic expressions defined here.
y 1 x–=
yx1–()
2
3–=
y 1 x–=
yx1–()
2
3–=