Signed area graph problem

[lrdheat]

Hi...
I put the function that I quoted in my original post in home...it works in home, but not in the graphing app.

How do I define a function as opposed to simply entering the function into home to the enter into the function app...it sounds as if you had a different experience in the graphing app when doing so (although why that would be the case is another question, and why CASIO and WP 34S, while suffering from same difficulty with the function for numbers close to zero, still come up with a good answer for the integral from 0 to 1). How does the Prime come up with a good answer for the integral in home, and why does it take so long compared to the other calculators that I referred to?

Puzzled, but interested!