Owner manual

Examples: Root-Finding with Plots

These examples of the interactive root-finding operations use

the expression f(x) = jc^-1 in the Function aplet with default

plot settings.

Select the Function aplet.

SYMB

{{X}} ■ [^] □ 1 [¡EUR]

IFUNCTIDN fVHBDLIC VIEH

^FKX>=Xa-l

F2t;x> =

F3<X> =

F4<X) =

F5<X> =

ROOT

[SETUP-PLOT]

[CLEAR]

PLOT

{{MENU}] {{FCN}}

Select Root {{OK}}

■ VI

ftDDT: -1

I8IJ!III

The crosshairs started at (0, -1). The root nearest the

crosshairs is x = -1. The crosshairs have moved to ( -1,0).

EXTREMUM

5efeci Extremum {{OK}}

,,,,v L/,,

EHTftM: <0,-D

isuim

SLOPE

Sefeci Slope {{OK}}

,, ,v

iaB;iii

The slope at the extremum (where the crosshairs are) is zero.

Plotting and Exploring Functions 3-21