I didn't know whether I should put this here or under Random.
I'd like to write a program for my TI-83 that calculates sigma notation. Unfortunately, I have no idea how (which is frustrating, because I'm usually pretty good with writing programs for my Honors Pre-Calc class).
If anyone could shed some light on the subject, or perhaps just provide me with the code for such a program, I'd be very appreciative.
There's two versions of the app. The free one he's talking about limits him to 15 messages a day, and there's a $6/year version for unlimited text. Plus, they put ads in the app to make their money back. Otherwise, it looks to be fine.