HOW DO I TYPE IN LOG BASE 3 OF 18 IN MY TI 30X

http://education.ti.com/guidebooks/scientific/30xii/teacher_guide/30xiitg-eng_.pdf page 108 may shed light on this. This may not be your exact model but the keys work the same.

Enter the base as the second argument, following a comma. For your example, enter it as logBASE(X,2) .

Is the original problem (log 10,000 - log 1,000) / (4 log 1.0125) ? If so, press
( 1 0 0 0 0 LOG - 1 0 0 0 LOG ) / ( 4 * 1 . 0 1 2 5 LOG =
and you should see the expected result.

What you call the antilog is also known as as the power function. More specifically, the inverse of a decimal log is the function 10 to a power, (10^x) It shares the same physical key as the log function. If the calculator has a key marked [LOG] you have to press the [2nd or SHIFT] key followed by the [LOG] key to activate the anti-log.

For natural log (logarithms in base e) the antilog is the exponential function (e^x). It shares the same physical key as the [LN] function.

Common antilog is the 2nd function of the LOG key, natural antilog is the 2nd function of the LN key.

There is no key dedicated to e. You can calculate the value by raising e to the first power: 1 2nd [e^x] =

If you want to take the log base b of x, enter it as log(x, b).

To get log, you can either type it in or press diamond 7.

To compute a log to any base, enter it as log(x, base). You can either select log from the catalog or simply type it in.

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 =

Hi,

You can download the required manual from:

http://education.ti.com/educationportal/sites/US/productDetail/us_ti30x_iis.html?bid=6

Hope this solves your problem. For more help and clarifications, please reply to this post. Thanks