[This is a guest post by David L. Morgan, who is an assistant professor of physics and astronomy at Eugene Lang College in Manhattan. -- JBJ] One of the first things I teach the students in my physics ...

I had to give back a loaned TI-83+ in June, and I purchased a TI-89 to replace it. I've figured out how to do most things, except these two which are really annoying me:<BR><BR>1. Cubic and higher ...