Casio CFX-9850G PLUS Instruction sheet

Getting Acquainted — Read This First!

Getting Acquainted

— Read This First!

About this User’s Guide

uFunction Keys and Menus

•Many of the operations performed by this calculator can be executed by pressing function

keys 1through 6. The operation assigned to each function key changes according to

the mode the calculator is in, and current operation assignments are indicated by function

menus that appear at the bottom of the display.

•This user’s guide indicates the current operation assigned to a function key in parentheses

following the key cap marking for that key. 1(Comp), for example, indicates that

pressing 1selects {Comp}, which is also indicated in the function menu.

•When {g} is indicated in the function menu for key 6, it means that pressing 6

displays the next page or previous page of menu options.

uMenu Titles

•Menu titles in this user’s guide include the key operation required to display the menu

being explained. The key operation for a menu that is displayed by pressing Kand then

{MAT} would be shown as: [OPTN]-[MAT].

•6(g) key operations to change to another menu page are not shown in menu title key

operations.

uCommand List

•The Program Mode Command List (page 453) provides a graphic flowchart of the various

function key menus that shows how to maneuver to the menu of commands you need.

Example: The following operation displays Xfct: [VARS]-[FACT]-[Xfct]

uIcons Used in This User’s Guide

•The following are the meanings of the icons used in this user’s guide.

: Function not supported by fx-9750G PLUS

: Important : Note : Reference page

P.000

CFX

1. Key Markings

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

functions 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.

Red Press aand then the key to perform the marked

function.

2. Selecting Icons and Entering Modes

This section describes how to select an icon in the Main Menu to enter the mode you want.

uTo select an icon

1. Press mto display the Main Menu.

Currently selected icon

2. Use the cursor keys (d, e, f, c) to move the highlighting to the icon

you want.

3. Press wto display the initial screen of the mode whose icon you selected.

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

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

•Use only the procedures described above to enter a mode. If you use any other

procedure, you may end up in a mode that is different than the one you thought

you selected.

The following explains the meaning of each icon.

Icon Mode Name Description

RUN Use this mode for arithmetic calculations

and function calculations, and for

calculations involving binary, octal, decimal

and hexadecimal values.

STATisticsUse this mode to perform single-variable

(standard deviation) and paired-variable

(regression) statistical calculations, to

perform tests, to analyze data and to draw

statistical graphs.

MATrix Use this mode for storing and editing

matrices.

LIST Use this mode for storing and editing

numeric data.

GRAPH Use this mode to store graph functions and

to draw graphs using the functions.

DYNAmic graph Use this mode to store graph functions and

to draw multiple versions of a graph by

changing the values assigned to the

variables in a function.

* The above shows the CFX-9850

GB PLUS screen.

TABLE 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.

RECURsion Use this mode to store recursion formulas,

to generate a numeric table of different

solutions as the values assigned to variables

in a function change, and to draw graphs.

CONICS Use this mode to draw graphs of conic

sections.

EQUAtion Use this mode to solve linear equations with

two through six unknowns, quadratic

equations, and cubic equations.

PRoGraM Use this mode to store programs in the

program area and to run programs.

Time Value of Use this mode to perform financial calcula-

Money tions and to draw cash flow and other types

of graphs.

LINK Use this mode to transfer memory contents

or back-up data to another unit.

CONTrast Use this mode to adjust the contrast of the

display.

MEMory Use this mode to check how much memory

is used and remaining, to delete data from

memory, and to initialize (reset) the

calculator.

Icon Mode Name Description

2Selecting Icons and Entering Modes

kUsing the Set Up Screen

The mode's set up screen shows the current status of mode settings and lets you

make any changes you want. The following procedure shows how to change a set

up.

uTo change a mode set up

1. Select the icon you want and press wto enter a mode and display its initial

screen. Here we will enter the RUN Mode.

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

screen.

•This set up screen is just one possible

example. Actual set up screen contents will

differ according to the mode you are in and

that mode’s current settings. 12345

CFX

fx-9750G

PLUS

Selecting Icons and Entering Modes 2

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 6) that is marked with the setting you want to

make.

5. After you are finished making any changes you want, press Jto 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.

uMode (calculation /binary, octal, decimal, hexadecimal mode)

•{Comp} ... {arithmetic calculation mode}

•{Dec}/{Hex}/{Bin}/{Oct} ... {decimal}/{hexadecimal}/{binary}/{octal}

uFunc Type (graph function type)

•{Y=}/{r=}/{Parm}/{X=c} ... {rectangular coordinate}/{polar coordinate}/

{parametric coordinate}/{X = constant} graph

•{Y>}/{Y<}/{Y }/{Y } ... {y>f(x)}/{y<f(x)}/{y≥f(x)}/{y≤f(x)} inequality graph

•The vkey inputs one of three different variable names. Which variable

name it inputs is determined by the {Func Type} setting you make.

uDraw Type (graph drawing method)

•{Con}/{Plot} ... {connected points}/{unconnected points}

uDerivative (derivative value display)

•{On}/{Off} ... {display on}/{display off} while Graph-to-Table, Table & Graph,

andTrace are being used

uAngle (default unit of angular measurement)

•{Deg}/{Rad}/{Gra} ... {degrees}/{radians}/{grads}

P. 7 5

P. 123

P. 125

P. 126

P. 128

P. 129

P. 177

P. 209

P. 1 4

12345

uCoord (graph pointer coordinate display)

•{On}/{Off} ... {display on}/{display off}

uGrid (graph gridline display)

•{On}/{Off} ... {display on}/{display off}

uAxes (graph axis display)

•{On}/{Off} ... {display on}/{display off}

uLabel (graph axis label display)

•{On}/{Off} ... {display on}/{display off}

uDisplay (display format)

•{Fix}/{Sci}/{Norm}/{Eng} ... {fixed number of decimal places specification}/

{number of significant digits specification}/{exponential format display

range toggle}/{Engineering Mode}

uIntegration (Integration calculation)

•{Gaus}/{Simp} ... integration calculation using {Gauss-Kronrod rule}/

{Simpson’s rule}.

uStat Wind (statistical graph view window setting method)

•{Auto}/{Man} ... {automatic}/{manual}

uGraph Func (function display during graph drawing and trace)

•{On}/{Off} ... {display on}/{display off}

uBackground (graph display background)

•{None}/{PICT} ... {no background}/{graph background picture specification}

uPlot/Line (plot and line graph color setting)

• {Blue}/{Orng}/{Grn} ... {blue}/{orange}/{green}

uResid List (residual calculation)

•{None}/{LIST} ... {no calculation}/{list specification for the calculated residual

data}

P. 1 4

P. 1 5

2Selecting Icons and Entering Modes

P. 121

P. 130

P. 6 0

P. 251

P. 187

P. 140

P. 267

CFX

uList File (list file specification)

•{File 1} to {File 6} ... {specification of which list file to display while using the

List function}

uDual Screen (Dual Screen Mode status)

The Dual Screen Mode settings you can make depends on whether you pressed

!Z while in the GRAPH Mode, TABLE Mode, or RECUR Mode.

GRAPH Mode

•{Grph}/{GtoT}/{Off} ... {graphing on both sides of Dual Screen}/{graph on one

side and numeric table on the other side of Dual Screen}/{Dual Screen off}

TABLE/RECUR Mode

•{T+G}/{Off} ... {graph on one side and numeric table on the other side of Dual

Screen}/{Dual Screen off}

uSimul Graph (simultaneous graphing mode)

•{On}/{Off} ... {simultaneous graphing on (all graphs drawn simultaneously)}/

{simultaneous graphing off (graphs drawn in area numeric sequence)}

uDynamic Type (Dynamic Graph type)

•{Cnt}/{Stop} ... {non-stop (continuous)}/{automatic stop after 10 draws}

uLocus (Dynamic Graph Locus Mode)

•{On}/{Off} ... {locus identified by color}/{locus not drawn}

uVariable (Table Generation and Graph Draw settings)

•{Rang}/{LIST} ... {use table range}/{use list data}

uΣDisplay (Σvalue display in recursion table)

•{On}/{Off} ... {display on}/{display off}

uSlope (display of derivative at current pointer location in conic

section graph)

•{On}/{Off} ... {display on}/{display off}

uPayment (payment period setting)

•{BGN}/{END} ... {beginning}/{end} setting of payment period

uDate Mode (number of days per year setting)

•{365}/{360} ... interest calculations using {365}/{360} days per year

*The 365-day year must be used for date calculations in the Financial Mode.

Otherwise, an error occurs.

Selecting Icons and Entering Modes 2

P. 248

P. 215

P. 186

P. 187

P. 208

P. 224

P. 331

P. 324

P. 168

P. 176

CFX

P. 188

P. 132

2Selecting Icons and Entering Modes

3. Display

kAbout the Display Screen

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

text display can show 21 columns and eight lines of characters, with the bottom

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

measures 127 (W) ×63 (H) dots.

Text Display Graph Display

kAbout Display Colors [OPTN]-[COLR]

The calculator can display data in three colors: orange, blue, and green. The

default color for graphs and comment text is blue, but you can specify orange or

green if you want.

•{Orng}/{Grn} ... {orange}/{green}

•The above setting affects the color of graphs and comment text. Specify the

color you want to use before inputting the graph’s function or the program

comment text.

kAbout Menu Item Types

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

pect when you press a function key.

• Next Menu

Example:

Selecting displays a menu of hyperbolic functions.

• Command Input

Example:

Selecting inputs the sinh command.

CFX

• 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

exponential 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.

uHow to interpret exponential format

1.2E+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.

1.2E–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 negative. This results in the value 0.0012.

Display 3

kSpecial Display Formats

This calculator uses special display formats to indicate fractions, hexadecimal

values, and sexagesimal values.

uFractions

..... Indicates: 456

uHexadecimal Values

..... Indicates: ABCDEF12(16), which

equals –1412567278(10)

uSexagesimal Values

..... Indicates: 12°34’ 56.78"

•In addition to the above, this calculator also uses other indicators or symbols,

which are described in each applicable section of this manual as they come up.

kCalculation Execution Indicator

Whenever the calculator is busy drawing a graph or executing a long, complex

calculation or program, a black box (k) flashes in the upper right corner of the

display. This black box tells you that the calculator is performing an internal

operation.

3Display

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