Casio FX-991ES Support Question
Casio FX-991ES Support Question
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Question posted by LImis on April 15th, 2014
How To Find Inverse Of A Matrix In Fx-991es
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Current Answers
Answer #1: Posted by waelsaidani1 on April 15th, 2014 7:56 AM
waelsaidani1
Member since:
May 12th, 2013 Points: 19,501,787
Member since:
May 12th, 2013 Points: 19,501,787
Related Casio FX-991ES Manual Pages
User Guide - Page 4
...
special, collateral, incidental, or consequential damages in the illustration nearby.
Rad : Specify Radian for the angle unit. • The following procedure when you see "Using Calculator Memory".
Example numbers (like "") in this User's Guide refer to select an on-screen menu item is represented in this User's Guide, cursor key operation...
User Guide - Page 5
... dispose of it by burning it. E-3 Battery
• After removing the battery from the calculator, put it in a safe place where it will not get into the
calculator. • Use only the type of battery specified for this calculator in personal injury or material damage if ignored. Doing so can result in
this...
User Guide - Page 7
... improve display readability, it , and then affix the hard case to adjust display contrast. Use d and e to the back of the calculator as shown in the illustration below. E-5
Before Using the Calculator
k Removing the Hard Case
Before using d and e while the mode menu (which appears when you want, press A.
• You can...
User Guide - Page 8
...value to recall the variable's value. The calculator is selected as the input/output format. Math style is in the VECTOR Mode.
There is in the MATRIX Mode. The calculator is a value stored in effect. A ... result of a variable name to the variable. k About the Display
Your calculator has a 31-dot × 96-dot LCD screen. The keypad will disappear when you press 1t(...
User Guide - Page 9
... Mode (1) Press N to display the mode
menu. c
f
E-7 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 want to select. • To select the...
User Guide - Page 34
... e in the COMP, STAT, EQN, MATRIX, TABLE, and VECTOR calculation modes. The explanations in this section show operation in functions. k Pi (π) and Natural Logarithm Base e
You can use the calculator's built-in the COMP Mode (N1).
• Certain function calculations may take some time to input. k Trigonometric and Inverse Trigonometric Functions
• Trigonometric and...
User Guide - Page 36
... values and errors may be negative when f(x) < 0 within f(x), a, b, or tol. • Integration calculations can be used if no base is specified. E-34
Specify a tol value that is 1 × 10...can be used in the COMP, STAT, EQN, MATRIX, TABLE, and VECTOR calculation modes.
• The X2, X3, X-1 functions can be used in complex number calculations in the COMP Mode only. • The ...
User Guide - Page 39
...Calculation range start point b: Calculation range end point
• a and b are integers in the range of -1 × 1010 < a < b < 1 × 1010.
• The calculation...in accordance with the
calculator's default angle unit setting. • Calculation result x is assigned...-X variables are performed using the calculator's default angle
unit.
• Calculation result r is assigned to variable...
User Guide - Page 43
...following are the π forms that are normally expressed in radians.
• After obtaining a calculation result in decimal form, it to ' form. Examples of the f key toggles between the two... form to standard form, the calculator automatically decides the standard form to perform. When the original calculation result is limited to inverse trigonometric function results and values that...
User Guide - Page 46
...Types
Key Menu Item 1 1-VAR 2 A+BX 3 _+CX2 4 In X 5 e^X 6 A•B^X 7 A•X^B 8 1/X
Statistical Calculation Single-variable Linear regression Quadratic regression Logarithmic regression e exponential regression ab exponential regression Power regression Inverse regression
k Inputting Sample Data
Displaying the STAT Editor Screen The STAT editor screen appears after you enter the STAT Mode...
User Guide - Page 54
Comments for logarithmic, e
exponential, ab exponential, power, and inverse regression. (FREQ: OFF)
Appendix Other Types of Regression Calculation: to
Command Usage Tips • The commands included in the Reg sub-menu can take a long
time to execute in logarithmic, e exponential, ab exponential, or power regression calculation when there are performed in this section are...
User Guide - Page 59
... a screen for a quadratic or cubic equation, you can use the f and c keys to
Matrix Calculations (MATRIX)
You can save matrices under the names "MatA", "MatB", and "MatC" in Matrix Memory
(1) In the MATRIX Mode, press 14(MATRIX)1(Dim). • This displays the matrix selection screen.
• Note that you can use f and c to switch the display between...
User Guide - Page 60
... is on the display.
(3) Specify the destination of the copy operation.
k Performing Matrix Calculations
Pressing A while the matrix selection screen or matrix editor screen is subject to the matrix calculation screen. E-58 MAT
"A" stands for Matrix B.
(3) Press a number key (1 through 6) to specify the matrix dimension you want to use. • Pressing a number key to specify the...
User Guide - Page 61
...) 3 × MatA (Matrix Scalar Multiplication) Obtain the determinant of Matrix A (MatA-1).
• Use the E key to input "-1". Select this input. • You cannot edit the contents of a cell. • To switch to the matrix calculation screen, press A. • While the MatAns screen is on the display, you press 14(MATRIX). Obtain the inverse matrix of Matrix A (det(MatA)).
User Guide - Page 62
Generating a Number Table
from a Function
(TABLE)
All calculations in the TABLE Mode (N7). Function: f(x) = x2 + 1 2
Start Value: 1, End Value: 5, Step Value: 1
LINE... 6 for this section are performed in this example.
Obtain the absolute value (Abs(MatB)) of each element of Matrix A.
• Use w to specify squaring, and 1w(x3) to specify the initial start value input screen. Determine ...
User Guide - Page 65
... of One Vector to Another Vector You can copy the contents of Vector Answer Memory (VctAns) or of One Matrix to do this menu item: When you want to Another Matrix" for obtaining the dot product of the last vector calculation. See "Copying the Contents of a vector in vector memory to the vector...
User Guide - Page 69
...-1x cos-1x
GRA Same as the matrix stack, described above. Squaring, cubing, or inverting a matrix also uses one level of the result. Calculation Range and Precision
Calculation Range
±1 × 10-99 to Keep in Mind for internal calculation, and calculation precision depends on the type of calculation you are cumulative in combination with the general...
User Guide - Page 71
... numeric stack or the command stack to be exceeded. • The calculation you are performing has caused the capacity of the matrix stack to be exceeded. • The calculation you are performing has caused the capacity of the vector stack to the calculation expression editing screen you
were using independent memory or a variable as...
User Guide - Page 72
... without the ending condition being fulfilled.
• Action • Try increasing the tol value. Note that type of calculation.
• Action • Specify the dimension of the matrix or vector and then perform the calculation again. • Check the dimensions specified for the matrices or vectors to see if they are trying to...
Appendix - Page 43
#104
MAT
1w(Abs)14(MATRIX) 4(MatB))
MAT
=
#105
MAT
14(MATRIX)3(MatA)w
MAT
=
MAT
14(MATRIX)3(MatA) 1w(x3)
MAT
=
#106
VCT
N8(VECTOR) 1(VctA)2(2)1= 2=
A15(VECTOR)1(Dim)
VCT
3(VctC)1(3)2=
y1= 2=
-42-
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