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Where is the "e" button for logarithm on the T I sxs

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I am not sure what model you are referring to. In general, to calculate natural logarithms you use the ln key. To calculate the exponential (e^x) you use [2nd] [LN] (e^x)
For decimal logarithms (logarithms in base 10) Use the [log] key. The inverse of the log(x) function is the power function 10^x. To access this function , use [2nd][log] (10^x).

Posted on Dec 26, 2013

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1 Answer

Logarithm


The Casio FX-300MS does not provide base 2 logarithms as a single key operation. However, you can use the natural logarithm (ln, base e = 2.7182818...) and the formula

log2 ( x ) = ln( x ) / ln( 2 )

To calculate the base 2 logarithm of 16, key in
[ln] 16 [/] [ln] 2 [=]
and get displayed the correct answer 4.

The same simple formula also works for any other base, and actually for any other logarithms provided by your calculator. The FX-300MS also provides a logarithm to base 10 (lg). You could also
type
[lg] 16 [/] [lg] 2 [=] to get the solution to the problem above, or
[lg] 25 [/] [lg] 5 [=] to get the base 5 logarithm of 25.

Mar 20, 2014 | Casio FX-300MS Calculator

1 Answer

What is the LN button for


It's for calculating the natural logarithm (logarithm base e).

Nov 17, 2013 | Texas Instruments TI-30XA Calculator

2 Answers

Change base log


The TI 86 has two logarithmic functions: natural logarithm (ln) and common (decimal) logarithms (log). If you need the logarithm in any other base than e or 10 you need to use one of the two equivalent expressions
log_b(x) =ln(x)/ln(b) =log(x)/log(b)
Here b is the value of the base of the logarithm and x is the argument (the value whose logarithm you are seeking). Of course the argument x must be a positive number.
Note: On the TI 86 the log function can calculate the logarithm of a complex number, according to the manual.

Sep 22, 2013 | Texas Instruments TI-86 Calculator

1 Answer

I need to find the LOG button


There is no such thing. Instead, you'll find the logarithm functions in the MATH LOG menu. Press the MATH button then select LOG. There are two logarithm functions in the menu, log for common (base-10) logarithm and ln for natural (base-e) logarithm.

Oct 03, 2012 | Texas Instruments TI-73 Calculator

1 Answer

How to use the log fucntion


To calculate the natural logarithm of a number, enter the number and press the LN key. To calculate the natural logarithm of a calculated result, simply press the LN key.
To calculate the natural logarithm of 3, press 3 LN
To calculate the logarithm to any other base, calculate the natural logarithm and then divide by the natural logarithm of the base.
To calculate the base-10 logarithm of 3, press 3 LN / 1 0 LN =

Apr 04, 2012 | Texas Instruments BA-II Plus Calculator

1 Answer

How to calculate logarithms using SHARP EL-531WH


you can press the "log" button or the "ln" for logarithmic calculations. the difference is just that "ln" calculates log on base "e".

Feb 18, 2011 | Sharp EL-531VB Calculator

1 Answer

I cannot figure out how to get the log key to look like this..log^-1. In my text book it said something about the ln button. That didn't work. Please help.


The logarithmic functions have inverse functions that happen to have specific names. Even if the log^-1 notation may found on textbooks you will not find it on claculators.

Natural Logarithms LN. The inverse function of the natural logarithm is the EXPONENTIAL noted e to the x or e^x. On calculators the two functions usually share the same physical key. For example, LN is accessed directly and e^x is accessed with

Jun 13, 2010 | Texas Instruments TI-83 Plus Calculator

1 Answer

How do i use the log function on my ba ii Calculator?


To calculate the natural logarithm of the value in the display, just press the LN button. If you need the common (base-10) logarithm, compute it as ln(x)/ln(10). That is, divide the natural logarithm of the value divided by the natural logarithm of ten.

May 20, 2010 | Texas Instruments BA-II Plus Calculator

1 Answer

How to enter logarithms in to a ti-83 plus. I know where the log button is but i cant figure out how to put in the base of the log or anything after that. Trying to graph a log.


The TI-83+ has keys for natural and common logarithms (base e and 10, LN and LOG, respectively). If you want to calculate the logarithm to another base, you have to use the relationship

LOGb(x) = LOG(x)/LOG(b) = LN(x)/LN(b)

Apr 10, 2010 | Texas Instruments TI-83 Plus Calculator

1 Answer

Using the correct key combination to determine inverse log


Hi,
Sorry to contradict you but there are many types of logarithms, the most important ones are
  1. the common logarithms (log in base 10),
  2. the natural logarithms (logarithms in base e)
  3. the binary logarithms (logarithms in base 2)
On calculators, the common logarithms are labeled [LOG], and the natural logarithms are labeled [LN].

The inverse function of the natural log function is the exponential (e^(x)), and the inverse of the log in base ten function is the function ten to the power of. It is called (sometimes) the antilog

Ex:
Question What is the antilog of 3.5678?
Answer The antilog of 3.5678 is 10^(3.5678) = 3696.579068
Verification: log(3696.57908) =3.5678

Hope it helps.



Nov 29, 2009 | Texas Instruments TI-30XA Calculator

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