Casio fx 991MS Support Question
Casio fx 991MS Support Question
Find answers below for this question about Casio fx 991MS - Scientific Display Calculator.Need a Casio fx 991MS manual? We have 1 online manual for this item!
Question posted by nvram2001 on April 24th, 2012
How To Solve Cubic Equation Using Fx-991 Ms Calculator? Pl. Help
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Related Casio fx 991MS Manual Pages
User Guide - Page 1
E
http://world.casio.com/edu_e/
fx-95MS fx-100MS fx-115MS (fx-912MS) fx-570MS fx-991MS
User's Guide
kfx-912MS owners
Please be sure to read the important notice of this manual.
User Guide - Page 4
... displays and illustrations (such as key markings) shown in this User's Guide are facing correctly when you do not plan to read the following safety precautions before using this calculator....use the calculator for a long time (fx-95MS/100MS/570MS). • Use only the type of battery specified for this calculator in this manual. Batteries
• After removing the battery from the calculator...
User Guide - Page 5
... Co., Ltd. Handling Precautions
• Be sure to press the 5 key before using the calculator for the first time.
• Even if the calculator is operating normally, replace the battery at least once every three years for the fx115MS/fx-570MS/fx-991MS, or at least once every two years for special, collateral, incidental, or consequential...
User Guide - Page 6
... with a ball-
point pen or other pointed object. • Use a soft, dry cloth to clean the exterior of humidity and dust. Take care never to leave the calculator where it to clean the calculator. Such conditions can damage the case.
4 Avoid carrying the calculator in a weak solution of humidity or dust. Doing so can...
User Guide - Page 8
... and
Permutation/Combination 20 kAngle Unit Conversion 21
kCoordinate Conversion (Pol (x, y), Rec (r 21
kEngineering Notation Calculations 22
Equation Calculations 22
kQuadratic and Cubic Equations 22 kSimultaneous Equations 24
Statistical Calculations 26
Standard Deviation 26 Regression Calculations 28
Technical Information 32
kWhen you have a problem 32 kError Messages 32 kOrder of...
User Guide - Page 9
Users of the mantissa has more than three digits. Before getting started... Two-line Display
The two-line display makes it possible to the "User's Guide 2 (Additional Functions)" for the fx-95MS only.
k Modes
Before starting a calculation, you must first enter the correct mode as indicated in the table below. • The following table shows...
User Guide - Page 10
... the sections of this manual, the name of the mode you need to input more than twice displays additional setup screens. Setup screens are actually used for a single calculation. k Input Capacity
• The memory area used to change the calculator setup.
• In this manual where they are described in the upper part of any...
User Guide - Page 11
... replay function stores the calculation formula and its result in replay memory. k Making Corrections During Input
• Use e and r to move the cursor to the location you want.
• Press [ to delete the number or function at the location where the error occurred.
9 Pressing the [ key displays the formula and result of the...
User Guide - Page 13
... following key operation when you want to initialize the calculation mode and setup, and clear replay memory and variables. Disp
1
• Display the selection screen.
fx-95MS:
1 r
Other Models: 1 r r
• Press the number key (1 or 2) that corresponds to
the setting you want to use the display setup (Disp) screen to specify the symbols you want...
User Guide - Page 15
fx-95MS:
1
Other Models: 1 r
• Press the number key (1 or 2) that corresponds to
the setting you want to use the display setup (Disp) screen to specify the display format when a fraction calculation result is greater than one.
• To change the fraction display format, press the q key a number of times until you reach the setup screen shown...
User Guide - Page 22
...ѿ 302 ҃ 1023
123 + 30 K =
• Example 5: 123 ҃ 1728
12 N * =
* A N in a group of fx-570MS/fx-991MS.
• Example 6: 1 ҃ 12
1 3
ȕ
1 4
R 3 a , 4 a T a =
• Example 7: 8! ҃...To determine how many different 4-member groups can be produced using the numbers 1 through 7
• Numbers cannot be organized in the case of 10 individuals (210)
10 ...
User Guide - Page 23
.../fx-570MS/
fx-991MS.
θ ҃ 1.047197551
0 o
• Press 0 n to display the value of .
21 D R G
1 2 3
• Pressing 1, 2, or 3 converts the displayed value to the corresponding angle unit.
• Example: To convert 4.25 radians to degrees
q ..... 1(Deg)
4.25 A v 2(R) =
4 . 25r
243.5070629
k Coordinate Conversion (Pol (x, y), Rec (r, θ ))
• Calculation...
User Guide - Page 24
... -3 (mg)
0.08125 = J
Equation
EQN
Calculations
The EQN Mode lets you
should scroll to
0.
Deg r ee?
2 3
Use this screen to solve an equation.
EQN F F 1 (fx-95MS) F F F 1 (Other Models)
k Quadratic and Cubic Equations
Quadratic Equation: ax2 + bx + c = 0 Cubic Equation: ax3 + bx2 + cx + d = 0 Entering the EQN Mode and pressing r displays the initial quadratic/cubic equation screen...
User Guide - Page 25
... for the final coefficient (c for a quadratic equation, d for a cubic equation), you can cause calculation to take more
time.
• Example 1: To solve the equation x3 - 2x2 - solutions.
Pressing the t key at this point returns to the coefficient input screen.
• Certain coefficients can use the [ and ] keys to toggle the display between the real part and imaginary part...
User Guide - Page 26
... To solve the equation 8x2 - 4x + 5 = 0 (x = 0.25 ± 0.75 i)
(Degree?) (a?) (b?) (c?) (x1 = 0.25 + 0.75i) (x2 = 0.25 - 0.75i)
2
8 = D 4 = 5 = ]
k Simultaneous Equations
Simultaneous Linear Equations with Two Unknowns: a1x + b1y = c1 a2x + b2y = c2
Simultaneous Linear Equations with Three Unknowns: a1x + b1y + c1z = d1 a2x + b2y + c2z = d2 a3x + b3y + c3z = d3
Entering the EQN Mode displays...
User Guide - Page 27
... want.
• Note that you
should scroll to the coefficient input screen.
• Example: To solve the following simultaneous equations 2x + 3y -
Pressing the t key at this point returns to
0.
Calculation starts and one of the solutions for coefficients. Use [ and ] to view other solutions. Variable name
x=
Arrow indicates
direction you cannot input complex...
User Guide - Page 28
...) = to clear statistical memory.
• Input data using standard deviation.
tions noted nearby. Statistical
SD
Calculations
REG
Standard Deviation
SD
Use the F key to enter the SD Mode when you want to perform statistical calculations using the key sequence shown below.
S
• Input data is indicated on the display (n value).
54 S 51 S 55 S 53 S S 54 S 52...
User Guide - Page 30
... you just input, without registering the value you just input. REG F 3 (fx-95MS) F F 2 (Other Models)
• Entering the REG Mode displays screens like the ones shown below.
L i n Log Ex p
1 23...do this, however, you will be unable to display or edit individual data items any of regression you want to perform statistical calculations using regression. Press 2 to exit data input without...
User Guide - Page 37
... stack has 10 levels and the command stack has 24 levels.
* fx-100MS/fx-115MS/fx-570MS/fx-991MS only. ** fx-570MS/fx-991MS only. • Operations of the matrix stack. The negative sign (-) is treated as a Type B function, so particular care is exceeded. • Matrix calculations use up to two levels of the same precedence are performed from
right...
User Guide - Page 40
... of exponential display, calculation error is ±1 at the last significant digit.) Errors are cumulative in the case of consecutive calculations, which can result in improper operation. Continued use of inflection... . Replace the battery as soon as possible when display figures become large. Power Supply (fx-95MS only)
Users of the calculator indicate that
hold the back cover in place
and ...
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