10-05-2015, 02:03 AM

I was going over some algebra homework with my oldest daughter tonight, and was showing her some graphs on the Prime to help her understanding. Also it was an opportunity to show off my new toy so there's that.

Anyway, using the Function app, I showed her a plot of y=X^6-8X^5+12X^4. We'd factored it and found that it has roots at 0, 2 and 6. We were surprised to see that the Prime missed plotting the root at 6. I suppose that the slope of the graph is so steep in this area that it looks like a discontinuity to the Prime.

[attachment=2640]

I checked the manual and it doesn't list any limitations for simple polynomial functions for the Function app. The equation plotted correctly in the Advanced Graphing app, but it took a while to narrow down the answer.

[attachment=2641]

Is there some setting somewhere that tells the Prime what constitutes a discontinuity? Is there a listing of the function types suited to each of the graphing apps?

Anyway, using the Function app, I showed her a plot of y=X^6-8X^5+12X^4. We'd factored it and found that it has roots at 0, 2 and 6. We were surprised to see that the Prime missed plotting the root at 6. I suppose that the slope of the graph is so steep in this area that it looks like a discontinuity to the Prime.

[attachment=2640]

I checked the manual and it doesn't list any limitations for simple polynomial functions for the Function app. The equation plotted correctly in the Advanced Graphing app, but it took a while to narrow down the answer.

[attachment=2641]

Is there some setting somewhere that tells the Prime what constitutes a discontinuity? Is there a listing of the function types suited to each of the graphing apps?