Question about Casio Brand New-Fx-991es Plus - Scientific Calculator

PRIME FACTORIZATION USING CASIO FX-991ES PLUS

My older Casion that got stolen was able to do the prime factorizastion using FACT. This one do not have that indicated on the calculator. I do not have my manual anymore. Can I do this with the FX-991ES PLUS

Posted by Anonymous on

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Posted on Jan 02, 2017

No, your calculator cannot factor polynomials. You need a calculator that has a CAS (computer Algebra System)
Yes Casio sells calculators with CAS: The FX-Algebra 2.0 and 1.0, the FX-9860GPLUS/GII SD, the GRAPH85 or 80 and the Graph 100+. You also have the CLASSPAD Series 300PLUS and 330.
TI and HP also have CAS calculators.

Texas Instruments
TI 89 /Titanium, Voyage 200PLT, TI92PLUS (discontinued), TI Inspire CAS.

Hewlet-Packard
HP 48G/G+/GX, HP40G, HP49G/G+ and the top of the line HP50G

Posted on Nov 03, 2010

how solve interpolation by casio fx 991 ex

Posted on Nov 28, 2010

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I do not think that the FX115ES can give you the prime factor decomposition of a number. The FX115ES Plus may do it.
On the FX991 ES Plus there is key marked FACT.. It is the one between the Change sign key (-) and the HYPerbolic key.
I am afraid you will have to do the decomposition of the two numbers by hand. For example
1440=(2^5)(3^2)(5)
700=(2^2)(5^2)(7)
By multiplying the two number you can get a multiple of both but it won't be the smallest.
What you do is scan the two decompositions to identify the various prime factors, 2,3,5, 7
All those factors must be present in the LCM. For each prime factor, select the largest exponent . This is going to be 5 for factor 2, 2 for factor 3, 2 for factor 5, and 1 for factor 7
Hence LCM(1440,700)= (2^5)(3^2)(5^2)(7^1)=50400
Verify that 50400/1440=35 and 50400/700=72

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Hello there,
First you need to find the P'rime factors' of 5765 which are 5 * 1153
Therefore the Exponential form of 5765 is 51 x 11531
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(That means the two Prime numbers that when multiplied together gives the answer.
. Go here to see how. to 'manually calculate like we used to do it,
http://www.calculatorsoup.com/calculators/math/prime-factors.php

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There is nothing you can do to make the calculator find the HCF for you. No point complaining about that. But if you are interested in doing it by hand (using the calculator to do the divisions for you) here how it is done.
1. Decompose the first number in prime factors. If a prime factor is repeated use the exponent notation: That helps.
2. Decompose the second number in prime factors too, using the exponent notation.
3. Now look at the two decompositions. If a prime factor is present in both decompositions it must be in the HCD /HCF, with the smallest of its two exponents.
4. Do that for all prime factors
Example: Here are the decompositions of two numbers
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The prime factors that are present in both decompositions are
2, 5, 7, and 11
From the two decompositions select the smallest power of each common prime factor. They are represented in bold fonts.
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The highest common divisor/Highest common factor is
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You will have to brush up on your Spanish. Sorry I do not do translations.

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Hello,
If I understand correctly you result do not display any decimal.
If you want a fixed number of decimal digits (exemple 2) Press the [MODE] key a number of times until you reach the screen that displays Fix Sci Nom and under them the numbers 1 2 3
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3 decimal digits [MODE] ---------[1 ] (Fix) 3
Hope it helps.

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