Casio FX-991ES Support Question
Casio FX-991ES Support Question
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Question posted by akmtteeol on July 22nd, 2014
How We Can Solve Three Equations With Three Unknowns Using Casio Fx-991es
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Related Casio FX-991ES Manual Pages
User Guide - Page 4
... manual, it . k Using the Separate Appendix
Whenever you perform.
• The cursor key is not part of this manual are subject to the corresponding example number in this User's Guide refer to change without notice. • In no event shall CASIO Computer Co., Ltd.
Moreover, CASIO Computer Co., Ltd. Initializing the Calculator
Perform the...
User Guide - Page 5
... expose the battery to direct heat or dispose of it by burning it.
E-3 Keep this manual handy for this calculator in a safe place where it will not get into the
calculator. • Use only the type of battery specified for later reference.
Safety Precautions
Be sure to read the following safety precautions before...
User Guide - Page 6
... or
other volatile agents to large amounts of the calculator. Because of the calculator. Very low temperatures can cause discoloration or deformation of the calculator's case, and damage to internal circuitry.
• Avoid use and storage of the calculator in areas subjected to clean the calculator. If the calculator becomes very dirty, wipe it off with this...
User Guide - Page 7
... its hard case downwards to remove it probably means that battery power is on the calculator. • Press 1A(OFF) to adjust display contrast. Before Using the Calculator
k Removing the Hard Case
Before using d and e while the mode menu (which appears when you press N) is low.
Important!
• If adjusting display contrast does not...
User Guide - Page 9
... are executed and displayed.
Select this type of operation: General calculations Complex number calculations Statistical and regression calculations Calculations involving specific number systems (binary, octal, decimal, hexadecimal) Equation solution Matrix calculations Generation of calculation that corresponds to the mode you can use to display the mode
menu. The setup menu has two...
User Guide - Page 12
... R(, arg(, Conjg(, Not(, Neg(, det(, Trn(, Rnd(
E-10
Inputting Expressions and Values
k Inputting a Calculation Expression Using Standard Format
Your calculator lets you input calculation expressions just as shown below , it .The calculator automatically judges the calculation priority sequence for addition, subtraction, multiplication, and division, functions, and parentheses. Example...
User Guide - Page 25
Using Multi-statements in Calculations
You can use the colon character (:) to connect two or more expressions and execute them in sequence from left to its sexagesimal equivalent. Example: To create a multi-statement that performs the following types of sexagesimal calculations
produces a sexagesimal result. - Multiplication or division of two sexagesimal values - Appendix Convert 2.255 to...
User Guide - Page 26
... Press f to back-step through calculation history memory contents. When the calculation you are using Linear format, you input and execute, and its result. Appendix
E-24 Calculation history memory shows both calculation expressions and results. Using Calculation History Memory and Replay
Calculation history memory maintains a record of each calculation expression you can press A and...
User Guide - Page 31
... you specify otherwise, an equation is solved for X.)
• Unless you are using contains more than one variable,
an input prompt appears for Y.); You can use SOLVE in the COMP Mode (N1) only. Appendix
Calculate an +1 = an + 2n (a1 = 1) as XY + C = 0.)
• SOLVE cannot be used to a2. *6 Value of a3 *8 Value of a5
Using SOLVE
(COMP)
SOLVE uses Newton's Method of...
User Guide - Page 33
... - Press = to continue or A to continue. • SOLVE uses Newton's Method, so even if there are multiple solutions, only ...SOLVE performs convergence a preset number of functions. -
The closer this value is to zero, the higher is assigned to the solution variable. x + 1 for the following types of times. A discontinuous function (y = 'x, etc.)
Solution Screen Contents
Input equation...
User Guide - Page 36
... Math format. • There may occur due to the type of function being fulfilled. • When performing an integration calculation involving trigonometric functions, specify Rad as the calculator's default angle unit. • Integration calculations can be used if no base is specified. Example: ∫(0.5X2 - 2, -2, 2) = -5.333333333 • A "Time Out" error occurs when an integration...
User Guide - Page 40
...)
These functions make it possible to 3-digit integer values by multiplying by your calculator will be used in the same modes as the trigonometric functions. Appendix How many four-person permutations... and combinations are
possible for a group of a stand-alone operation, the calculation is performed using only the first value (either the r-value or the X-value) produced by the...
User Guide - Page 42
... Performing S-D transformation again converts back to the left.
Formats Supported for S-D Transformation S-D transformation can use S-D transformation to one of the following equation are
equal:
Σ e
∞
=
n = 0
1 n!
E-40 (Check rounded ... can be used to transform a displayed decimal calculation result to transform a value between standard form and decimal form.
User Guide - Page 52
See Appendix for information about the calculation
formula used for each command. Sum Sub-menu (11(STAT)4(Sum))
Select this menu item: ...the Y-data
4maxY Maximum value of the Y-data
E-50 y = A + BX
The following model equation.
Commands when Linear Regression Calculation (A+BX) Is Selected With linear regression, regression is performed in accordance with the following are the commands ...
User Guide - Page 53
...) Is Selected With quadratic regression, regression is performed in
Example . E-51 Appendix Quadratic Regression Calculation: to
• Examples through all use the data input in accordance with the following model equation.
Reg Sub-menu (11(STAT)7(Reg))
Select this menu item: 1A 2B
3C
4m1 5m2 6n
When you want to obtain this...
User Guide - Page 54
...
( Appendix to ). Statistical Calculation Type
Logarithmic Regression (ln X)
e Exponential Regression (e^X)
ab Exponential Regression (A•B^X)
Model Equation
y = A + Bln X y = AeBX y = ABX
Power Regression (A•X^B) y = AXB
Inverse Regression (1/X)
y
=
A
+
B X
Calculation Formula
Appendix Comparison of Regression Curves • The following example uses the data input in...
User Guide - Page 57
...Key
Menu Item
1 anX + bnY = cn
2 anX + bnY + cnZ = dn
3 aX2 + bX + c = 0 4 aX3 + bX2 + cX + d = 0
Equation Type
Simultaneous Linear Equations with Two Unknowns
Simultaneous Linear Equations with a minus sign. Appendix
Examples through show examples of calculations with negative binary values and examples of a two's complement
• Negative binary, octal, and hexadecimal values are...
User Guide - Page 58
...use the cursor keys to move the cursor to it, which causes the screen to shift. • The values and expressions you can input on the coefficient editor screen are basically the same as those you can clear all coefficients to zero by the currently selected equation...You can input in the COMP Mode with three unknowns or cubic equation is selected as those for Inputting and Editing Coefficients ...
User Guide - Page 59
... cannot transform values to select. • This displays a screen for configuring dimension settings. Matrix calculation results are performed in the MATRIX Mode (N6).
• In the case of simultaneous linear equations, you can use the f and c keys to
Matrix Calculations (MATRIX)
You can use f and c to switch the display between X1, X2, and X3.
All...
User Guide - Page 72
....
Insufficient MEM Error • Cause
• There is not enough memory to perform a calculation with the calculation.
E-70 Can't Solve Error (SOLVE feature only) • Cause
• The calculator could not obtain a solution. • Action
• Check for errors in the equation that you input. • Input a value for the matrices or vectors to the expected...
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