I looked in the instructional book that came on the calculator and it said to type on the problem and then select logbase and put in the base number. However, whenever I attempted it, I got syntax eror. If you could give me a step by step instructional I would much appreciate it!

It's 2*3=6 but about the base, you can't change it in the calculators the default base it's 10 so log x it's Logbase 10^x here some logs:

log x base y = log x / log y

log (x*y) = log x + log y

log (x/y) = log x - log y

in your example log 9 base 3 = log 9 / log 3 etc.

hope you get it, and it was helpful

Posted on Jul 06, 2009

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Posted on Jan 02, 2017

That depends on the make and model of the calculator. A few calculators have a logBASE or similar function which takes an arbitrary base. Most only have logs to base e (ln) and base 10 (log).

However, the log of x to any base can be calculated on any calculator with logs as either

log x / log base

or

ln x / ln base

However, the log of x to any base can be calculated on any calculator with logs as either

log x / log base

or

ln x / ln base

Sep 05, 2014 | Office Equipment & Supplies

The TI-84 is a bit of a pain this way. You need to access the logBASE function either through the catalog or the MATH menu. You can't spell the function name as with some other calculators.

Press MATH, scroll down to the logBASE entry, then press ENTER. This will put "logBASE(" into the entry line. You can then enter the arguments and press ENTER to calculate the result. For example, to calculate the log base 2 of 8, press MATH, down-arrow a number of times to logBASE, press ENTER 8 , 2 ENTER. This should give you 3.

Press MATH, scroll down to the logBASE entry, then press ENTER. This will put "logBASE(" into the entry line. You can then enter the arguments and press ENTER to calculate the result. For example, to calculate the log base 2 of 8, press MATH, down-arrow a number of times to logBASE, press ENTER 8 , 2 ENTER. This should give you 3.

Apr 02, 2014 | Texas Instruments TI-84 Plus Calculator

To calculate logarithms to a base other than e or 10, use the logBASE function in the MATH MATH menu. Press the MATH key, then scroll up/down to logBASE.

Dec 12, 2013 | Texas Instruments TI-84 Plus Calculator

Use the logBASE function available in the MATH menu. Press MATH, use cursor-left/right to select the MATH submenu, then use cursor-up/down to access logBASE.

Nov 21, 2013 | Texas Instruments TI-83 Plus Calculator

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

May 16, 2013 | Texas Instruments TI-84 Plus Calculator

"log(2)8" means "common logarithm of 2 multiplied by 8".

The TI-84 has three different logarithm functions.

log is the common (base-10) logarithm.

ln is the natural (base-e) logarithm.

logBASE lets you take the logarithm to any positive base.

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.

The TI-84 has three different logarithm functions.

log is the common (base-10) logarithm.

ln is the natural (base-e) logarithm.

logBASE lets you take the logarithm to any positive base.

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.

Sep 30, 2012 | Texas Instruments TI-84 Plus Calculator

The new OS's (2.53 MP and higher) have the MathPrint feature. However the new feature coexists with the old one CLASSIC and you can choose one or the other.

To set that up, Press the MODE key, scroll down to go to the second page. At the top you have MathPrint and CLASSIC. Use right Arrow to highlight one othe the other then press ENTER to validate. Press [2nd][MODE] to (QUIT).

**If you are in MathPrint mode**, the logbase command will echo as a template with squares to fill. You enter the base in the lower square and the argument in the upper one.

**If you are in CLASSIC Mode** logbase appears as** logBASE(**. Complete the argument list by entering the number whose LOG you want separated by a comma from the base)

Example logBase(8,2) yields the value 3.

To set that up, Press the MODE key, scroll down to go to the second page. At the top you have MathPrint and CLASSIC. Use right Arrow to highlight one othe the other then press ENTER to validate. Press [2nd][MODE] to (QUIT).

Example logBase(8,2) yields the value 3.

Jan 09, 2012 | Texas Instruments TI-84 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 have the latest version of the firmware (2.53) you can use the logBASE function available in the CATALOG. If you don't have the latest firmware, you can get it from http://education.ti.com

Regardless of the firmware version, you can always compute the logarithm to any base by using the relationship

logb(x) = log(x)/log(b) = ln(x)/ln(b)

Regardless of the firmware version, you can always compute the logarithm to any base by using the relationship

logb(x) = log(x)/log(b) = ln(x)/ln(b)

May 02, 2010 | Texas Instruments TI-83 Plus Calculator

Instruction book for this calculator is shocking for sure. It would take too long to explain fully, here is an example of plotting a simple Y= graph.

In main menu, when you first turn it on, press 1

This is normal calculator mode.

Press [shift] [menu] to get the set up parameters.

Scroll curser down one to Func Type, and select Y= if this is not already set, by pressing F1

Continue scrolling down to set Coord, Grid, Axes and Label functions. Turn these on or off as desired. Turn them all off for this example. F1 and F2 select On or Off here.

Press [exit]

Press [shift] F3 to access the V-window parameters. Here you set the size of the axis in the graph

Enter 0 for Xmin, 360 for Xmax, 0.1 for scale

Enter -1 for Ymin, 1 for Ymax, and 0.1 for scale

Press [exit]

Press [shift] F4 to enter graph plot mode (Sketch mode)

Press F1 then [EXE] to clear any previous graphs

Press F5 then F1 to select Y= type graph

Display should show Graph Y=

press [sin] [ X,0,T] (this key just under red alpha key) then [EXE]

Calculator should draw a sine wave, showing 1 complete wave

Try setting the parameters in Set up, Axes On, Label On etc to see the effect.

Hope this helps a little. Page 123 in book deals with graphing.

In main menu, when you first turn it on, press 1

This is normal calculator mode.

Press [shift] [menu] to get the set up parameters.

Scroll curser down one to Func Type, and select Y= if this is not already set, by pressing F1

Continue scrolling down to set Coord, Grid, Axes and Label functions. Turn these on or off as desired. Turn them all off for this example. F1 and F2 select On or Off here.

Press [exit]

Press [shift] F3 to access the V-window parameters. Here you set the size of the axis in the graph

Enter 0 for Xmin, 360 for Xmax, 0.1 for scale

Enter -1 for Ymin, 1 for Ymax, and 0.1 for scale

Press [exit]

Press [shift] F4 to enter graph plot mode (Sketch mode)

Press F1 then [EXE] to clear any previous graphs

Press F5 then F1 to select Y= type graph

Display should show Graph Y=

press [sin] [ X,0,T] (this key just under red alpha key) then [EXE]

Calculator should draw a sine wave, showing 1 complete wave

Try setting the parameters in Set up, Axes On, Label On etc to see the effect.

Hope this helps a little. Page 123 in book deals with graphing.

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Here is an example of a problem I have to solve. Logbase 3 X 9^logbase3^27

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