Question about Texas Instruments TI-82 Calculator

# TI-82 I am attempting to calculate a natural logarithm. There is no INV key that I know of on this calcualtor although I do have an ex key. Any ideas on how I might go about doing this without the INV key or is there one on this model that I am not seeing.

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• glovers4 May 22, 2008

I need to find an antilogirithm. My chemistry book says to use the "inv" key and there isn't one on this calculator.

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I believe the natural logarithm key is the ln key, located below the log key. If you are trying to do the inverse of that (for example, if you are trying to solve a chem problem where you need e^x) then use 2nd ln.

Posted on Oct 05, 2008

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## Related Questions:

### 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.

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### How do i raise e to a power on my calculator

That is the exponential function. Look for a key marked [LN] (the natural logarithm). The exponential function e^(x) shares the same physical key as the natural logarithm.
You access one function directly (marking on surface of key) and the other with [2nd] [LN]

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### How to find logarithm

For the common logarithm use the LOG key to the left of the 7 key. For the natural logarithm use the LN key to the left of the 4 key.
In either case press the key and then enter the value or expression whose log you want.
For example, to calculate the common log of 3, press
LOG 3 ENTER

Mar 28, 2012 | Texas Instruments TI-83 Plus Calculator

### Where can I find the log values in TI 89

For natural logarithms, you can use the ln function (2ND shift of the X key). For example, the natural logarithm of 3 is 2ND [LN] 3 ) ENTER.

For logarithms to other bases, use the log function (diamond shift of the 7 key). For example, the base-2 logarithm of 16 is diamond 7 1 6 , 2 ) ENTER. If the base is 10 (common logarithms), you can omit the comma and the second argument.

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### How do you do logarithmic problems on the TI-30X?

Use the LOG key for common logarithms, the LN key for natural logarithms. Use the SHIFT of those keys for antilogarithms.

Example: to calculate the natural log of 2, press LN 2 =

Sep 16, 2010 | Texas Instruments TI 30XIIS Scientific...

### On the TI-36X, whihc key is the inverse key and

The inverse key is marked "1/x" (second key on the third row). The natural logarithm key is marked "LN" (fourth key on the top row).

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### 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

### 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.

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### How to use the Logerithmic function on this calculator

Hi,

Logarithms in base 10 :Common logarithms
1. The calculator has a key labeled [LOG]. It allows you to calculate the common logarithms (logarithms in base 10).
2. To calculate the common logarithm of a (positive) number you type in the number, press the [LOG] key .
3. Ex: 15.32 [LOG][=] gives 1.1852558765
Logarithms in base e : Natural logarithms
1. The calculator has a key labeled [LN]. It allows you to calculate the natural logarithms of positive numbers.
2. Ex: natural log of 15.32 is entered as
3. 15.32 [LN] gives 2.729159164
Hope it helps.
Don't forget to rate the solution and don't be stingy: 4 thumbs up won't leave you any the poorer.

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### Natural logarithm with TI-30XA calculator

I noticed that this calculator doesn't have a natural logarithm function as well. You can can always use the fact that
ln x = (log x) /log e or since log e is approximately .43429482
ln x = (log x)/.43429482. The greatest solution and it might be worth the 15 bucks or so to get a calculator with e^x and the natural logarithm function.

Feb 20, 2009 | Texas Instruments TI-30XA Calculator

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