Question about Casio FX-300MS Calculator

I want to know how to calculate in calculator "casio fx-991ms" fx-991ms" to calculate log value

Re: how to calculate log value in calculator with...

In any scientific calculator log2(n) can be calculated 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

Posted on Apr 24, 2009

Re: how to calculate log value in calculator with...

To Ishelton- I think you are just messing up on your order of operations when entering it into the calculator. What I assume you meant was 10^(8.89932-10), but instead the calculator sees it as (10^8.993) - 10.

If you want to calculate a different base other than ten, then just use your log rules, and its easy as pie in your head.

lets see if I remember this...

take the base of the log and have it equal to the other side of your equation and raise that to the power of the initial value here's an example and quick log lesson:

Log(base x)4 = 8 so that the the x is the base or subscript of the log when you look at it visually.

this means you will have x^8 =4

then you know that we will have 8 log x = 4

if you know the base value and dont know the exponent, its the same thing

Log(base 7) 4 = x

7^x = 4

x Log 7 = 4

x =4 / Log7

and Ill give a final example for the hell of it if you really struggle with basic algebra.

Log (base4)x =5

4^5 = x

x = 1024

There is no need for a calculator to have the ability to do logs of any base other than 10. All the work can be done in your head faster than you can type the base in anyways.

The work above SHOULD be correct, as I'm just remembering off the top of my head, I don't have my notes from that course on me atm.

Posted on May 06, 2009

Re: how to calculate log value in calculator with...

(log(1870)-log(100)

________________ =

(log(40,000)-log(100)

Posted on Dec 10, 2010

Re: how to calculate log value in calculator with...

(log a)2_(log b)2=log(a/b).log(ab)

Posted on Aug 11, 2009

Re: how to calculate log value in calculator with...

Log (base 4) 3 what is the value<br /> <br />

Posted on Aug 19, 2010

Re: how to calculate log value in calculator with...

Can anyone please tell me how to calculate the adjoint of a matrix on fx 991ms ???

Posted on May 28, 2008

Re: how to calculate log value in calculator with...

To calculate logb to base a,perform logb /loga

Posted on May 17, 2008

Re: how to calculate log value in calculator with...

How to use 991ms in calculus

Posted on May 15, 2008

Re: how to calculate log value in calculator with...

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Posted on May 12, 2008

Re: how to calculate log value in calculator with...

If u want to calculate matrice using casio fx-991ms calculator. First u have to put ur calculator in the matrix mode simply by pressing mode mode mode 2 this put ur calculator in a matrix mode.then press shift 4,ur calculator will display Dim Edit Mat,if u should scroll right it would display Det Tran. To calculate matrix first u have to put in the dimension of the matrice which u want to calculate e.g for a 2x2 matrix press shift 4 and 1 it will display A B C press 1 to put in the dimension of matrix A,for a 3x3 matrix press 3=3 then slot in then value the matrix.

Posted on Feb 24, 2012

Re: how to calculate log value in calculator with...

I want to know how to add inches

Ex. 2'.6" + 2'.7"+ 3'.3"= 8'.4"

I want the answer to appear as ( 8'.4") or

it is ok even if it appears as (8.333). I can always calculate .333 into inches

Posted on Mar 28, 2008

Casiodisplay format (Disp) settings while the calculator is in the BASE ... Be sure to checkthe current calculation mode (SD, REG,. COMP ... Use [ and ] to display the expression 4 + 4. Press A ... want to perform scientific function calculations. COMP .

Dec 03, 2015 | Casio Calculators

I checked in the manual and found that this calculator does not support Base-N calculations. On the FX-991ES Plus, which has a Base-N mode, fractions , exponents, and other floating points are not supported. The non-integer part is chopped off.

Jan 23, 2014 | Casio FX-300MS Calculator

On a fx-991MS? With many other models, including the fx-991ES, I'd say you have the calculator in binary mode but the 991MS doesn't have such a mode.

Aug 03, 2013 | Calculators

Your calculator knows only the decimal logarithms log or log_10 and the natural logarithms (ln or log in base e).

So you cannot compute directly the logarithms in any bases other than 10 and e.

A workaround consists in using the relation

log in base b of a number a (log_b (a))

log_b(a)= (log_10(a) ) / (log_10 (b))

or the relation

log_b(a)= ln(a)/ln(b)

log_2(0.3)=log(0.3)/log(2) where log is log in base 10

Similarly

log_2(0.3)=ln(0.3)/ln(2)

As to the multiplicative factor you had at the beginning of your expression, just multiply the value obtained by one on the formulas above (both formulas will give the same result) by 0.3

So you cannot compute directly the logarithms in any bases other than 10 and e.

A workaround consists in using the relation

log in base b of a number a (log_b (a))

log_b(a)= (log_10(a) ) / (log_10 (b))

or the relation

log_b(a)= ln(a)/ln(b)

log_2(0.3)=log(0.3)/log(2) where log is log in base 10

Similarly

log_2(0.3)=ln(0.3)/ln(2)

As to the multiplicative factor you had at the beginning of your expression, just multiply the value obtained by one on the formulas above (both formulas will give the same result) by 0.3

Jul 18, 2010 | Casio FX-115ES Scientific Calculator

I don't know about fx-9750gII, but for fx-991MS

Change the mode to REG

Then

Shift->3(DISTR)->1(P())->give your Z value

Change the mode to REG

Then

Shift->3(DISTR)->1(P())->give your Z value

Jan 07, 2010 | Casio Calculators

Hello,
There is a key for that, the one labeled [ln] for natural logarithm. For log in base 10 use the key [LOG]
[LN] 10 [ENTER] gives 2.302585093.
As you certainly know, you cannot take the logarithm of a negative number, nor of Zero.

Hope it helps.

Hope it helps.

Nov 01, 2009 | Casio FX-300MS Calculator

Hello,

If by calculus problem you mean derivatives of functions, integrals, extrema and such things, I am sorry to inform you that neither the Casio FX-300MS, nor the FX-991MS can handle them. The newer Casio calculator FX-991ES is capable of performing numerical differentiations and integrations. There also graphing calculators by Casio FX-9750G, FX-9860G as well as by Texas Instruments (TI 83 PLUS/TI84PLUS) that are reasonably performant in that area.

Hope it helps.

If by calculus problem you mean derivatives of functions, integrals, extrema and such things, I am sorry to inform you that neither the Casio FX-300MS, nor the FX-991MS can handle them. The newer Casio calculator FX-991ES is capable of performing numerical differentiations and integrations. There also graphing calculators by Casio FX-9750G, FX-9860G as well as by Texas Instruments (TI 83 PLUS/TI84PLUS) that are reasonably performant in that area.

Hope it helps.

Oct 19, 2009 | Casio FX-300MS Calculator

you need the change of base formula:

log base b of m is ln m / ln b

So- to find log base 2 of 8, simply find ln8/ln2

(from Wikipedia - the proof also follows if you want to go look it up)

While there are several useful identities, the most important for calculator use lets one find logarithms with bases other than those built into the calculator (usually log*e* and log10). To find a logarithm with base *b*, using any other base *k*:

log base b of m is ln m / ln b

So- to find log base 2 of 8, simply find ln8/ln2

(from Wikipedia - the proof also follows if you want to go look it up)

While there are several useful identities, the most important for calculator use lets one find logarithms with bases other than those built into the calculator (usually log

Oct 06, 2009 | Casio FX-300MS Calculator

Like you maybe know in math (I know!) log x base y = log x / log y

so what you need its just input your number (x for example) and log it, than divide log x by log 2.

just: log x / log 2. (by the way in calculator the meaning of log x is log x base 10 the default base is 10)

so what you need its just input your number (x for example) and log it, than divide log x by log 2.

just: log x / log 2. (by the way in calculator the meaning of log x is log x base 10 the default base is 10)

Jun 05, 2009 | Casio FX-300MS Calculator

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