Casio Fx-7400G PLUS User manual

Getting Acquainted

— Read This First!

Chapter

: Important notes

: Notes

: Reference pages

The symbols in this manual indicate the

following messages.

P. 000

Chapter 1 Getting Acquainted

1. Using the Main Menu

The main menu appears on the display whenever you turn on the calculator. It con-

tains a number of icons that let you select the mode (work area) for the type of

operation you want to perform. You can also make the Main Menu appear at any time

by pressing m.

The following explains the meaning of each icon.

Icon Meaning

Use this mode for arithmetic calculations and func-

tion calculations.

Use this mode to perform single-variable (stand-

ard deviation) and paired-variable (regression) sta-

tistical calculations, and to draw statistical graphs.

Use this mode for storing and editing numeric

data.

Use this mode to store graph functions and to

draw graphs using the functions.

Use this mode to store functions, to generate a

numeric table of different solutions as the values

assigned to variables in a function change, and

to draw graphs.

Use this mode to store programs in the program

area and to run programs.

Use this mode to transfer memory contents or

back-up data to another unit.

Use this mode to adjust the contrast of the dis-

play.

Use this mode to check how much memory is

used and remaining, to delete data from memory,

and to initialize (reset) the calculator.

Getting Acquainted Chapter 1

uTo enter a mode

Example To enter the RUN Mode from the Main Menu

1. Press mto display the Main Menu.

2. Use d, e, f, and cto move the highlighting to the RUN icon.

3. Press wto enter the RUN Mode.

•You can also enter a mode without highlighting an icon in the Main Menu by

inputting the number marked in the lower right corner of the icon.

•When you enter a mode, up to four function key menu items appear at the bottom

of the display. Each menu item corresponds to the function key (1, 2, 3,

4) that is below the item. Some function menus have multiple pages. When this

happens, you should press [to advance to the next menu page.

Example Menus

12341234

Chapter 1 Getting Acquainted

Alpha Lock

Normally, once you press aand then a key to input an alphabetic char-

acter, the keyboard reverts to its primary functions immediately. If you press

!and then a, the keyboard locks in alpha input until you press a

again.

2. Key Table

Getting Acquainted Chapter 1

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Page Page PagePagePagePage

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139

Trace Zoom

Sketch

V-Window

Chapter 1 Getting Acquainted

3. Key Markings

Many of the calculator’s keys are used to perform more than one function. The func-

tions marked on the keyboard are color coded to help you find the one you need

quickly and easily.

Function Key Operation

1log l

210x!l

3Bal

The following describes the color coding used for key markings.

Color Key Operation

Orange Press !and then the key to perform the marked

function.

RedPress aand then the key to perform the marked

function.

4. Selecting Modes

kUsing the Set Up Screen

The first thing that appears when you enter a mode is the mode’s set up screen,

which shows the current status of settings for the mode. The following procedure

shows how to change a set up.

uTo change a mode set up

1. Select the icon you want and press wenter a mode and display its initial screen.

Here we will enter the RUN Mode.

Getting Acquainted Chapter 1

2. Press !Z to display the mode’s set up

screen.

•This set up screen is just one possible exam-

ple. Actual set up screen contents will differ

according to the mode you are in and that

mode’s current settings.

3. Use the fand ccursor keys to move the highlighting to the item whose

setting you want to change.

4. Press the function key (1to 4) that is marked with the setting you want to

make.

5. After you are finished making any changes you want, press Qto return to the

initial screen of the mode.

kSet Up Screen Function Key Menus

This section details the settings you can make using the function keys in the set up

display.

uGraph Function Type (F-Type)

1(Y=) .......... Rectangular coordinate

graphs

2(Parm) ...... Parametric coordinate graphs

[

1(Y>) .......... y> f(x)inequality graph

2(Y<) .......... y< f(x)inequality graph

3(Y≥).......... y>f(x)inequality graph

4(Y≤).......... y<f(x)inequality graph

Press [to return to the previous menu.

•The setting you make for F-Type determines the variable name that is input when

you press T.

uGraph Draw Type (D-Type)

1(Con) ........ Connection of points plot-

ted on graph.

2(Plot) ......... Plotting of points on graph

without connection.

1234

1234[

1234

Chapter 1 Getting Acquainted

uAngle unit (Angle)

1(Deg) ........ Specifies degrees as

default.

2(Rad) ........ Specifies radians as

default.

3(Gra) ......... Specifies grads as default.

uStatistical Graph View Window Setting (S-Wind)

1(Auto) ........ Automatic setting of view

window values for statisti-

cal graph drawing.

2(Man) ........ Manual setting of view

window values for statisti-

cal graph drawing.

uGraph Function Display (G-Func)

1(On) .......... Turns on display of function

during graph drawing and

trace.

2(Off) .......... Turns off display of function

during graph drawing and

trace.

uSimultaneous Graph Mode (Simul-G)

1(On) .......... Turns on simultaneous

graphing of all functions in

memory.

2(Off) .......... Simultaneous graphing off

(graphs drawn one-by-

one).

uTable & Graph Generation Settings (Var)

1(RANG) .... Table generation and graph

drawing using numeric ta-

ble range.

2(List1)

3(List2) ....

4(List3)

P. 120

1234

Table generation and graph

drawing using list data.

P. 7 5

1234[

Getting Acquainted Chapter 1

[

1(List4)

2(List5) ....

3(List6)

Press [to return to the previous menu.

Other menus for set up (Display, Simplfy, Frac) are described in each applicable

section of this manual as they come up.

Abbreviations

STAT ............... Statistics

PRGM ............. Program

CONT.............. Contrast

MEM ............... Memory

5. Display

kAbout the Display Screen

This calculator uses two types of display: a text display and a graphic display. The

text display can show 13 columns and six lines of characters, with the bottom line

used for the function key menu, while the graph display uses an area that measures

79 (W) ×47 (H) dots.

Text Display Graph Display

kAbout Menu Item Types

This calculator uses certain conventions to indicate the type of result you can expect

when you press a function key.

• Next Menu

Example:

Selecting displays a menu of list functions.

• Command Input

Example:

Selecting inputs the “List” command.

Table generation and graph

drawing using list data.

1234[

Chapter 1 Getting Acquainted

• Direct Command Execution

Example:

Selecting executes the DRAW command.

kExponential Display

The calculator normally displays values up to 10 digits long. Values that exceed this

limit are automatically converted to and displayed in exponential format. You can

specify one of two different ranges for automatic changeover to exponential display.

Norm 1 ............ 10–2 (0.01) > |x|, |x| >1010

Norm 2 ............ 10–9 (0.000000001) > |x|, |x| >1010

uTo change the exponential display range

1. Press !Z to display the Set Up Screen.

2. Use fand cto move the highlighting to “Display”.

3. Press 3(Norm).

The exponential display range switches between Norm 1 and Norm 2 each time you

perform the above operation. There is no display indicator to show you which expo-

nential display range is currently in effect, but you can always check it by seeing what

results the following calculation produces.

Ab/caaw(Norm 1)

(Norm 2)

All of the examples in this manual show calculation results using Norm 1.

For full details about the “Display”, see “Selecting Value Display Modes”.

uHow to interpret exponential format

1.2+12 indicates that the result is equivalent to 1.2 ×1012. This means that you should

move the decimal point in 1.2 twelve places to the right, because the exponent is

positive. This results in the value 1,200,000,000,000.

1.2–03 indicates that the result is equivalent to 1.2 ×10–3. This means that you should

move the decimal point in 1.2 three places to the left, because the exponent is nega-

tive. This results in the value 0.0012.

P. 2 7

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