# Need Help With Math/Chemistry Program (Scientific Calculator)

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• Specializes in Med-Surg, Trauma, Ortho, Neuro, Cardiac. Has 31 years experience.

So I have this TI-30xIIB so-call scientific calculator but I'm having trouble findig the inverse log function.

Will someone with a calculator give me the inverse log of 12.54?

You will not be doing my work for me, but helping me along the way.

Anyone with this kind of calculator know how to do it? It's not in the handout that came with it. And everywhere I look it say "hit the inverse" button on your calculator and there isn't one that I can see.

Thanks so much!

250 Posts

Tweety:

On my TI-36X Solar scientific calculator, the LOG key has a yellow 10x (10 to the X power, not 10*X) on the key above the word LOG. So, you press the yellow 2nd key, then the LOG key to get the common antilogarithm, as the manual calls it. This appears to be the same thing as an inverse log. The answer I get is 3.467368505 12 (3.467 times 10 to the 12th).

I did a quick dogpile search on this topic, and I believe that I am correct. However, this is not an easy question to answer since the terminology differs (inverse log versus common antilogarithm).

32,946 Posts

Specializes in Med-Surg, Trauma, Ortho, Neuro, Cardiac. Has 31 years experience.

That seems to work! Duh...Thanks so much. But................

My big problem here is that I neglected to say I need the inverse log or antilog of -12.54. (inverse log of -12.54). I can't seem to get it to work. "Syntax Error" is what I get.

When I use your answer and use times 10 to the negative 12 that's not the answer.

Can anyone help me?

25 Posts

Maybe this will work, type -12.54>>>2nd function>>>log key>>>. Let me know

That seems to work! Duh...Thanks so much. But................

My big problem here is that I neglected to say I need the inverse log or antilog of -12.54. (inverse log of -12.54). I can't seem to get it to work. "Syntax Error" is what I get.

When I use your answer and use times 10 to the negative 12 that's not the answer.

Can anyone help me?

243 Posts

Tweety, I have the same calculator. Type 2nd, then Log, then your number inside the parentheses (-12.54). You should get 2.884031503 times 10 to the 13th.

32,946 Posts

Specializes in Med-Surg, Trauma, Ortho, Neuro, Cardiac. Has 31 years experience.
Tweety, I have the same calculator. Type 2nd, then Log, then your number inside the parentheses (-12.54). You should get 2.884031503 times 10 to the 13th.

Thanks so much. When I take the log of 2.88 x 10 to the -13 I get 12.54, so I know that's the right answer, but I can't for the life of me get my calculator to do it. UGH!

Thank you so much for your help, that helped a lot and was very kind of you.

I'll keep trying!

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