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Topic: table program for TI-85
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Posts: 10,730
Registered: 12/3/04
table program for TI-85
Posted: Nov 8, 1997 10:22 AM
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Sonya Kelsick asks
To all AP Calculus teachers:

I have just started using the Ostebee-Zorn book this year for Calculus AB.
Many of my students own a TI-85 with some sort of program that will do
basic tables. However, in our text, they often ask students to find limits
of functions that are undefined at some value and difficult to analyze by
just looking at the graph. The 82's and 83's table feature allows a much
better picture of what is happening on either side of a given point. Does
anyone know of a table program that will print "Error" or deal with
undefined values on the TI-85? Thanks.


The attached file LIST.85p is my own table files for TI-85. (The name is
LIST is, perhaps, a poor choice, but it lists the values of a function).
Download and enter it into the TI-85s with the Graph-link.

Enter up to five functions as y1, y2, y3, y4, and / or y5. Then run the
program. Follow the directions on the screen. After entering x, delta x and
choosing a function the first time the program remembers the set up values
and you only need change the ones you want to change.

It does not indicate a "division by zero" error. To avoid the problem
10^(-9) is added to the x-values used. Therefore you have to be very clever
to actually divide by zero, yet the values with less than seven decimal
places are accurate.

Other programs are available at the TI website

I hope this is a help :-)

Lin McMullin
Ballston Spa, NY

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