Question about Casio FX-115ES Scientific Calculator

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For natural antilogarithm use the e^x (SHIFT ln).

For common antilogarithm use the 10^x (SHIFT log).

In either case the antilog is the shifted function of the log key.

Posted on Sep 12, 2010

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Posted on Jan 02, 2017

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SOURCE: how do i use the inverse log operation on the TI-84

If I understand you correctly, the inverse of the log operation is exponentiation. So if your log = x, the inverse is 10 raised to the x power. On most TI calculators this is on the same key as the log function.


Posted on Jun 13, 2008

  • 43 Answers

SOURCE: CAn't find the inverse log on the calculator

Press "2nd LN" which gives you the exponential (inverse natural log) of 7.41 = 1652.426....

Pressing LN will give you back 7.41

Same procedure to use logs to base 10, use LOG and 2nd LOG

Posted on Dec 31, 2008

  • 43 Answers

SOURCE: antilog in chemistry problem

pH is minus (log to base 10) of the hydrogen ion activity of an aqueous solution, or (log to base 10) of (1/hydrogen ion activity)

To get the inverse log, i.e the hydrogen ion activity corresponding to a specified pH, simply enter the pH value and press


Answer 0.001

Posted on Jan 01, 2009

  • 81 Answers

SOURCE: how do i perform the calculation of log (base 2)

Yes look you can't enter the base in calculators it's default 10 so use:
log x base y = log x / log y
log (x*y) = log x + log y
log (x/y) = log x - log y
so instead of log 8 base 2 input log 8 / log 2 it's easy
hope you understand :)

Posted on Jul 06, 2009

  • 7993 Answers

SOURCE: how do i use the inv log for calculations on my sharp el-531wh


Let y=10^(x) 10 to the power of x
Take the log of both tems of the equality. You get
log(y)=log[10^(x)] where I used square brackets for clarity. But from the general properties of logarithms

log(b^(a)) = a*log(b)
Applied to our expression above
But since we are using log as log in base 10, log_10(10)=1
We thus have two equivalent relations
y=10^x <----> x=log(y) The double arrow stands for equivalence.

If y is the log of x, then x is the antilog of y

Your question: With log_10 standing for logarith in base 10
pH=-log_10(c) c= concentration
Then log_10(c)=-pH the equivalence above translates as
log_10(c)=-pH is equivalent to c=10^(-pH)

The concentartion corresponding to a pH of 7.41 is

You enter it as follows

Hope it helps

Posted on Sep 07, 2009

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1 Answer

How do I calculate inverse logs on casio fx-82au plus?

The inverse of log functions are power functions.
Inv of ln is exponential (e^x)
Inv of log in base 10 is 10^(x)
A function and its inverse usually share the same physical key. One function is accessed directly, the other by using the SHIFT or 2ndF key.


Aug 18, 2014 | Casio Office Equipment & Supplies

1 Answer

How can i calculate log inverse with my fx-991ES plus

By 'log inverse', you presumably mean the inverse of the logarithm function. There are two logarithm functions on most scientific calculators. Firstly [ln], or natural logarithms, to the base e, where the inverse is e^x. Secondly [log], or logarithms to the base 10, where the inverse is 10^x.

Example 1 : ln(2) = 0.69314718 so e^0.69314718 = 2
Example 2: log(2) = 0.301029995 so 10^0.30102995 = 2

Oct 02, 2011 | Casio FX-115ES Scientific Calculator

1 Answer

Hi, how do i calculate log^-1(-2) on my ti-30xa? thank u.

The inverse of the log function is the power function.
For log in base 10 that inverse is 10 to a power of
More generally, let b be the base of the logarithm. If y=log_b (x) then x=b^y
For your case log=log_10, to calculate the inverse you perform 10^(-2)=0.01=1/100
On calculators the log in base 10 and its inverse share the same physical key. One is accessed directly, the other is the shifted key function.

Sep 09, 2011 | Texas Instruments TI-30XA Calculator

1 Answer

How to take anti log in casio fx 991 ms and give example?

Depending on the actual log function you are talking about, the inverse function (what you call the anti log) can be one of several things.
The inverse of the natural log (LN) is the exponential function e^x.
If y= ln(x) then x=e^y
On a calculator functions that are inverse of one another share the same physical key. If one function is marked on a key, the inverse function is usually the SHIFTED (or 2nd) key
The inverse of the common (decimal logarithm) is the power function with 10 as base.
Example: if y= log(x) then x=10^y
For an arbitrary base (must be positive) if y= log_b(x) then x=b^y.
Note: I do not think that the FX-300ms can perform log calculations in bases other than e (natural log) or 10 (common decimal log).

Aug 13, 2011 | Casio FX-300MS Calculator

1 Answer

What button do you push on the TI-86 calculator to do the inv log function?

For the inverse natural log, press 2nd LN. For the inverse common log, press 2nd LOG.

For example, to calculate the inverse natural log of 2, press 2nd LN 2 ENTER and you'll get about 7.389 .

Jan 25, 2011 | Texas Instruments TI-86 Calculator

1 Answer

How do i perform log and log inverse or antilog calculations on my sharp EL W-535 calculator

Press the log key, enter a poistive number and press the = key.
To calculate the inverse of the decimal log use SHIFT LOG to access the function 10^x (the inverse of the log function.)

Dec 15, 2010 | Sharp ELW535 Calculator

1 Answer

I need an inverse log button on the casio calculator 9750GII.... does it have one??? I know how to do log, but can't find the inverse.

The log base 10 function has an inverse: It is the 10 ^x function. It shares the same physical key with the decimal log. Use [SHIFT][LOG].
The natural log (LN) has an inverse alos and that it the exponentila function e^x. It shares the same physical key with it.

Jul 20, 2010 | Casio FX-9750GPlus Calculator

1 Answer

How do I calculate the inverse log on the TI-89?

The wrong terminology is playing tricks on you.
  1. If you are talking about the natural logarithms, the inverse function of the natural log is the exponential: ln(e^(x))=e^(ln(x)) = x
  2. If you are talking about the common logarithms (log in base 10) to find the antilog of a number, say x, you raise 10 to the power of x.
Exemple: What is the antilog ( that is the name, not inverse log) of 0.345?
Answer; antilog of 0.345 = 10^(0.345) =2.21309471

Look at the last two commands on the screen capture.

Hope it helps
Thanks for using FixYa

Nov 17, 2009 | Texas Instruments TI-89 Calculator

1 Answer

How do I do an inverse log function on my HP 33s calculator?

The inverse of the common log is the raise 10 to a power. the inverse of the natural log is the exponential. The log and the antilog share the same key, one is accessed directly the other as a seconf/shifted function. Same thing for the natural log (ln) and the exponential.

Oct 19, 2009 | HP 33s scientific calculator Scientific...

1 Answer

CAn't find the inverse log on the calculator

Press "2nd LN" which gives you the exponential (inverse natural log) of 7.41 = 1652.426....

Pressing LN will give you back 7.41

Same procedure to use logs to base 10, use LOG and 2nd LOG

Dec 07, 2008 | Texas Instruments TI-30XA Calculator

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