N désigne le nombre maximum de points
        apparaissant sur les paraboles.

c = 10
b = -3
a = 0.02
N = 210 (slider from 1 to 300, step 1)
liste1 = Sequence((a * k^(2)) + ((b * cos(k)) * k) + c, k, 0, N, 1)
liste2 = Sequence(Point[{k, Element[liste1, k + 1]}], k, 0, N)
d: y = (a * x^(2)) + (b * x) + c
e: y = (a * x^(2)) - (b * x) + c
texte1: "u_n=" + (LaTeX[a]) + "×n^{2}" + (LaTeX[b]) + "×cos\left( n  \right) ×n+" + (LaTeX[c]) + ""