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Casio CLASSPAD 330 3.04 User Manual

Page 315

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S To obtain the minimum value, maximum value,

f

Max,

f

Min,

y

-intercept,

and inflection of a function

Example: To graph the function

y

=

x

2

(

x

+ 2)(

x

– 2) and obtain its minimum value

(1) Display the View Window dialog box, and then configure it with the following

parameters.

xmin = –7.7, xmax = 7.7, xscale = 1

ymin = –3.8, ymax = 3.8, yscale = 1

(2) On the Graph Editor window, input and store

y

=

x

2

(

x

+ 2)(

x

– 2) into line

y

1, and

then tap to graph it.

• Make sure that only

y

1 is checked.

(3) Tap [Analysis], [G-Solve], and then [Min], or tap ).

• This displays “Min” on the Graph window, and locates a pointer at the first solution of

the minimum value (minimum value of

y

for smallest value of

x

). The

x

- and

y

-coordinates at the current pointer location are also shown on the Graph window.

(4) To obtain other minimum values, press the left or right cursor key, or tap the left or

right graph controller arrows.

• If there is only one solution, the pointer does not move when you press the cursor

key.

Result Screenshots

3-8-3

Analyzing a Function Used to Draw a Graph

1
2

Tip

• To obtain the other values, select the applicable command on the [G-Solve] menu in step (3) of

the above procedure.

Maximum value

Max (or tap

U)

Select this G-Solve menu command:

To obtain this value:

Minimum value in the range
displayed on the Graph window

y

-intercept

Inflection

Point of inflection

y

-intercept

f

Min

f

Max

Maximum value in the range
displayed on the Graph window

1
2