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The 30XIIS does not have the capability of solving equations. It can, however, calculate expressions using logarithms. Use the LOG key for common logarithms and the LN key for natural logarithms. In both cases, press the function key, enter the value or expression, and then ) to match the ( the function automatically enters.

The LOG and LN keys are the second and third keys from the top in the leftmost column of the keyboard.

Posted on Nov 17, 2010

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Posted on Jan 02, 2017

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The integral cannot be calculated in terms of the elementary functions. It is given by dilogarithm Li_2. Note here that log stands for the natural logarithm (ln)

Jan 01, 2014 | Texas Instruments TI-89 Calculator

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 =

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

You press [alpha] then [f3] to open the func menu. Use the arrow keys to highlight logbase( and press enter.

then type in the value , base). Keystrokes would be [alpha] [f3] arrow and select logbase( , then [1] [(divide)

[4] [,] [4] [)] [=] . (your screen should look like logbase(1/4 , 4) = -1.

then type in the value , base). Keystrokes would be [alpha] [f3] arrow and select logbase( , then [1] [(divide)

[4] [,] [4] [)] [=] . (your screen should look like logbase(1/4 , 4) = -1.

Mar 04, 2011 | Texas Instruments TI-85 Calculator

If you want to take the log of X using base B, where B is an arbitrary number, use the following equation:

logB(X) = log10(X) / log10(B)

In words this is the log base B of X equals the log base 10 of X divided by the log base 10 of B. This equation can now be solved using your calculator.

I hope this helps you out.

logB(X) = log10(X) / log10(B)

In words this is the log base B of X equals the log base 10 of X divided by the log base 10 of B. This equation can now be solved using your calculator.

I hope this helps you out.

Feb 09, 2011 | Vacuums

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.

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.

Apr 28, 2010 | Texas Instruments TI-89 Calculator

For natural logarithms Press [2nd][X], enter a positive number, close the right parenthesis and press [ENTER]. If the number is decimal the result is displayed as a number. If the number is integer, put a decimal mark at its end to have the result displayed as decimal.

For decimal logarithms use the ALPHA keyboard to enter the log( command, complete the argument and press ENTER

If you want to calculate log in base a of number b type log(b,a).

For decimal logarithms use the ALPHA keyboard to enter the log( command, complete the argument and press ENTER

If you want to calculate log in base a of number b type log(b,a).

Apr 13, 2010 | Texas Instruments TI-89 Calculator

Hi,

**Logarithms in base 10 :Common logarithms**

**Logarithms in base e : Natural logarithms**

Don't forget to rate the solution and don't be stingy: 4 thumbs up won't leave you any the poorer.

- The calculator has a key labeled [LOG]. It allows you to calculate the common logarithms (logarithms in base 10).
- To calculate the common logarithm of a (positive) number you type in the number, press the [LOG] key .
- Ex: 15.32 [LOG][=] gives 1.1852558765

- The calculator has a key labeled [LN]. It allows you to calculate the natural logarithms of positive numbers.
- Ex: natural log of 15.32 is entered as
- 15.32 [LN] gives 2.729159164

Don't forget to rate the solution and don't be stingy: 4 thumbs up won't leave you any the poorer.

Nov 23, 2009 | Texas Instruments TI-36 X Solar Calculator

For logarithms one uses one of two keys

**[LOG] for logarithms in base 10**. It is in the same column as the F1 key, on 4th row**[LN] for natural logarithms.**It is in the same column as the F2 key, fourth row, to the right of the [LOG] key.

Jul 25, 2009 | Casio FX-7400G Plus Calculator

to do logarithms with other bases, use change-of-base.
let's say you want to do log base 5 of 25. for clarity i'll write this as log(5) 25.
you would have to do log(10) 25 / log(10) 5 to get 2.
key sequence:
[LOG], 2, 5, ), / (divide), [LOG], 5, )

Apr 03, 2009 | Texas Instruments TI-83 Plus Calculator

You re-asked this question more clearly and I answered it.....

Dec 14, 2008 | Texas Instruments TI-30XA Calculator

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What make and model?

It is a TI-30X IIS from Texas Instruments.

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