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How do I calculate logs of bases other than 10 on the TI-83 Plus family of graphing calculators? The log( function can be used to calculate bases other than 10 by using a logarithmic identity log a b = log(b)/log(a) Example: Calculate log 4 160 • Press [LOG], input 160, then press [ ) ]. • Press [÷]. • Press [LOG], input 4, then press [ ) ].
That would work on a TI-84 Plus (with a slight adjustment, you'd need to use the logBASE() function). With the latest operating system you'd also have the option of using the MathPrint log template and fill in the base interactively.
How to insert a log base OTHER THAN 10 into a Ti-83 Plus Calculator! I hope this helped because I was at a point like you are right now and I needed this type of advice.
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In this tutorial on the inverse functions: y = 2 ^ x and y = log base 2 of x, I am using the program Camtasia Studio 2 to visually capture the key strokes of a cursor on a virtual TI 83 + calculator, and to also record the sound of my voice which is explaining the different steps taken.
Graphing calculators such as those from Texas Instruments (e.g., TI-83/84/89) often have built-in functions for log base calculations. To perform a log base 2 operation on a graphing calculator: Step 1: Press the “MATH” button. Step 2: Scroll down to find the “logBASE ()” function and press enter.
This audio/visual presentation, created with Camtasia, is simple and effective and illustrates the inverse relationship between f(x)=2^x and g(x)=log(base2)x. A pair of animated TI-83 Plus calculators is used to illustrate the relationship.
