Question about Texas Instruments TI-36 X Solar Calculator

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Hoe do you use logarithm on TI-36X SOLAR?

Ie: log of 8 to the base of 2

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  • dark_ange618 May 17, 2009

    thnkx..& i learend a way to do thiz: it is same as sayin log8 divided by log2

    & yes..answer iz 3... =D

  • Kimberly Granados
    Kimberly Granados May 27, 2015

    thank you so much. You save me in chemistry.



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Basically you first have to put your answer into scientific notation by pressing the 3rd key then the 6 key. The screen display should change to one big zero and two small zeros.

I was workinggon the same problem with a -log of a chemistry problem to get pH and I knew the answer because I calculated it on it TI-85, but we are not allowed to use graphing calulators on the exam (:-((() so I had to figure out how to do it on this one!

For example, I had pH =-log(2.828947x10^4)

On the TI-36X you change to scientific notation using the instructions above. Once the three zeros enter on the screen:

1^-04 should appear on screen, then you multiply by 2.828947

then your screen will show the answer in scientific notation.

2.828947 in big numbers and in small numbers -04
From there you simply press:
and your answer will show up as a negative number. Just take the absolute value of that and you have your answer. Took me like 30 minutes the night before a huge chemistry exam to figure that out! Hope it helps someone!

Posted on Aug 04, 2010

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Loga 32.654=5.01

Posted on Jun 04, 2009

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Well, I am not sure, because I do not own a TI-36X SOLAR. but the answer to your example is 3. The [LOG] key on the TI graphing calculators is at position {1,6} (first column, 6th button down.)

Posted on May 15, 2009

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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.
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If you want the log base 2 of 8, you want logBASE(2,8). You'll find the logBASE function in the catalog, accessible by pressing 2ND [CATALOG] ). CATALOG is the shifted function of the 0 key, the ) gets you to the Ls in the catalog.

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You can calculate the log to any base by using the relationship logb(x) = log(x)/log(b) = ln(x)/ln(b). In words, the base-b logarithm of x is the logarithm of x divided by the logarithm of b.

So, to calculate the log base 3 of 18, press
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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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1 Answer

Using the correct key combination to determine inverse log

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

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

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How to use the Logerithmic function on this calculator


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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1 Answer

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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, )

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