CASIO fx-CG50 question

[lrdheat]

Thanks, good information.

I am still having difficulties. I used SolveN(d/dx (x^2 (x+1)^3 )/((x-2)^2 (x-4)^4) and got 5 zeroes (4 are mins or maxes, 1 is an inflection). As you stated, this goes into List ans. I have the equation that I applied d/dx stored in the graph app as Y15. How do I evaluate Y15 using the List ans?

The graph of Y15 can be plotted and analyzed over a domain of, say, -25 to 10, and it produces max and mins at the same numbers produced by SolveN. I cannot figure out how to produce the max/mins using List ans.