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Question posted by nikitamd123 on October 24th, 2021

How To Sigma In Caio Fx 991ms?

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Answer #1: Posted by Troubleshooter101 on October 24th, 2021 4:14 PM

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Troubleshooter101

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In any scientific calculator log2(n) can becalculated with either ln or log function as follows

Log2(n)= ln(n) / ln(2)

Or
Log2(n)=log(n) / log(2)

both will give nearly the same answers

https://www.fixya.com/support/t12832186-summation_in_casio_fx_991ms

Thanks

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Troublshooter101

Answer #2: Posted by SonuKumar on October 25th, 2021 9:00 AM

SonuKumar

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May 9th, 2021

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https://www.fixya.com/support/t12832186-summation_in_casio_fx_991ms

https://www.youtube.com/watch?v=aFZqKHhVH1k

https://www.youtube.com/watch?v=a5y1CmMNHmk

https://support.casio.com/pdf/004/fx115MS_991MS_E.pdf

Log2(n)= ln(n) / ln(2)

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Related Casio fx 991MS Manual Pages

User Guide - Page 1

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. E http://world.casio.com/edu_e/

User Guide - Page 3

Removing and Replacing the Calculator's Cover • Before starting .....1 Holding the cover as shown in the illustration, slide the unit out of the cover. • After you are finished .....2 ... illustration, slide the unit out of the cover. • Always slide the keyboard end of the unit into the cover first. Never slide the display end of the unit into the cover. .....1 .....2 1

User Guide - Page 4

... fire and personal injury. • The displays and illustrations (such as key markings) shown in this User's Guide are facing correctly when you load it will not get into the calculator. • Remove the battery if you do not plan to use the calculator for a long time (fx-95MS/100MS/570MS). • Use only...

User Guide - Page 5

.... Very low temperatures can cause slow display response, total failure of the display, and shortening of the calculator. Heat can cause discoloration or deformation ...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 the fx-95MS/fx...

User Guide - Page 7

... Display Formats 10 kDecimal Point and Separator Symbols 11 k Initializing the Calculator 11 Basic Calculations 11 k Arithmetic Calculations 11 kFraction Operations 12 kPercentage Calculations 14 kDegrees, Minutes, Seconds Calculations 15 kFIX, SCI, RND 15 Memory Calculations 16 kAnswer Memory 16 kConsecutive Calculations 17 kIndependent Memory 17 k Variables 17 Scientific...

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

... required operations for information about modes and their selection. Two-line Display The two-line display makes it possible to the "User's Guide 2 (Additional Functions)" for the fx-95MS only. Before getting started... Users of other models should refer to view both the calculation formula and its result at the same time. • The...

User Guide - Page 10

... the initial defaults shown below, press A B 2(Mode) =. Example: Equation Calculations EQN Note! • To return the calculation mode and setup to input more than twice displays additional setup screens. One step is indicated in a subsequent calculation. If you need to enter in order to perform the calculations being described is taken up to change the...

User Guide - Page 13

sin -1.23 → S R D 1.23 T 11 A B 3(All) = Basic Calculations COMP k Arithmetic Calculations Use the F key to enter the COMP Mode when you reach the setup screen shown below. 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...

User Guide - Page 14

... fraction values. • Note that mix fraction and decimal values are always decimal. • It is not necessary to perform. 12 k Fraction Operations uFraction Calculations • Values are displayed in decimal format automatically whenever the total number of digits of a fractional value (integer + numerator + denominator + separator marks) exceeds 10. • Example 1: 2 ѿ...

User Guide - Page 15

... A B 5 3.00 A B 1 2 3.00 • You can use . 1(ab/c): Mixed fraction 2(d/c): Improper fraction 13 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...

User Guide - Page 20

...1155; 6.9 193.2 A j 1 \ 23 = p 1 \ 28 = Scientific Function Calculations COMP Use the F key to enter the COMP Mode when you want to perform basic arithmetic calculations. COMP F 1 • Certain types of calculations may take a long time to complete. • Wait for the result to appear on the display before starting the next calculation. • π = 3.14159265359 k Trigonometric...

User Guide - Page 22

... ) ҃ 1.988647795 7 A H 123 = • Example 4: 123 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! ҃ 40320 8 A f = • Example 8: To generate a random number between 0.000 and 0.999 A M = 0.66400 (The...

User Guide - Page 23

... convert rectangular coordinates (1, 3) to polar coordinates (r,␪) (Rad) r ҃ 2 f* 1 P L 3 T = * A f in the case of ␪. 21 * A n in the case of fx-100MS/fx-115MS/fx-570MS/ fx-991MS. θ ҃ 1.047197551 0 o • Press 0 n to display the value of r, or 0 o to display the value of fx-100MS/fx-115MS/fx-570MS/ fx-991MS. k Angle Unit Conversion • Press A v to...

User Guide - Page 24

... milligrams → 81.25 ҂10 -3 (mg) 0.08125 = J Equation EQN Calculations The EQN Mode lets you should scroll to 0. Coefficient name a? Arrow indicates direction you ...as the degree of the equation, and input values for each of the coefficients. EQN F F 1 (fx-95MS) F F F 1 (Other Models) k Quadratic and Cubic Equations Quadratic Equation: ax2 + bx + c = ...

User Guide - Page 28

...data using the key sequence shown below. SD F 2 (fx-95MS) F F 1 (Other Models) • Always start data input with A B 1(Scl) = to calculate values for the following data : 55, 54, 51,... recall using the key opera- Each time you want to perform statistical calculations using standard deviation. S • Input data is indicated on the display (n value). 54 S 51 S 55 S 53 S S 54 S 52 S Sample...

User Guide - Page 30

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 re Pw r I ...you will not be unable to display or edit individual data items any of regression you have just input, press A U. • After inputting statistical data in memory. Press 2 to perform statistical calculations using regression. If you do...

User Guide - Page 37

...; ex{In( 120)} • Other operations are performed from right to right. • Operations enclosed in parentheses are performed from left to left. * fx-100MS/fx-115MS/fx-570MS/fx-991MS only. ** fx-570MS/fx-991MS only. • Operations of the same precedence are performed first. • When a calculation contains an argument that the capacity of the matrix stack.

User Guide - Page 40

... are cumulative and may become dim. Power Supply (fx-95MS only) Users of other models should refer to turn power off. Replace the battery as soon as possible when display figures become large. Screw 2 Remove the six screws that battery power is low. This calculator is powered by a single AA-size battery. * For...

User Guide - Page 41

... model name) apply to the description of the fx-912MS should refer to turn power back on. Power Supply: Single AA-size battery (R6P (SUM-3)) Battery Life: Approximately 17,000 hours continuous display of other models should refer to the same model. u Auto Power Off Calculator power automatically turns off . Dimensions: 19.5 (H) i 78...