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# how to find an antilogarithm on a ti-89

Posted on 2005-04-27
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I figured this would be the place to find somebody who's used the TI-89 . . at least I hope so.

I'm doing a chemistry assignment, and I've a problem. I'm supposed to find the natural antilogarithm (at least that's what I think I'm doing) of a number . . I've done a ton of calculations and this is the last step, I'm so frustrated to be sooo close.

Basically . . I need to figure out how to use my TI-89 to find out what e^(-somenumber) is. Oh, yeah, and it's due in the morning. :D
0
Question by:princess_of_reason

LVL 37

Expert Comment

Hi princess_of_reason,

You might be knowing...

exp(x) is nothing but antilog( x ) to base e

y = log10 (x) => x = 10^y

Similarly

y = ln (x) => x = e^y

You can use this in your calculator...

Hope this helps :)

Bye
--
Harish
0

LVL 6

Accepted Solution

If the number is on your screen press :

inv
ln

Hope this helps
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Author Comment

On the TI-89, I've found that you would press the green diamond button, then ln. Is that the same? I'm not sure. . :?

Thankee!
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