FCN functions

The FCN functions are:

Function

Description

 

 

Root

Select Root to find the root of the

 

current function nearest the

 

cursor. If no root is found, but only

 

an extremum, then the result is

 

labeled EXTR: instead of ROOT:.

 

(The root-finder is also used in the

 

Solve aplet. See also “Interpreting

 

results” on page 7-6.) The cursor

 

is moved to the root value on the

 

x-axis and the resulting x-value is

 

saved in a variable named

 

ROOT.

Extremum

Select Extremum to find the

 

maximum or minimum of the

 

current function nearest the

 

cursor. This displays the

 

coordinate values and moves the

 

cursor to the extremum. The

 

resulting value is saved in a

 

variable named EXTREMUM.

Slope

Select Slope to find the numeric

 

derivative at the current position

 

of the cursor. The result is saved in

 

a variable named SLOPE.

Signed area

Select Signed area to find the

 

numeric integral. (If there are two

 

or more expressions

 

checkmarked, then you will be

 

asked to choose the second

 

expression from a list that

 

includes the x-axis.) Select a

 

starting point, then move the

 

cursor to selection ending point.

 

The result is saved in a variable

 

named AREA.

 

 

3-10

Function aplet