二次函数逐点绘制

GeoGebra 命令及参数

1. Coefficients(f) → list1
2. Length(list1) → n_t
3. Element(list1, 2) → b
4. Element(list1, 1) → a
5. Sequence(h_{p}(x)^(k), k, n_t - 1, 2, -1) → list2
6. Join({list2, list2a}) → list2sum
7. Sequence(Element[list1, n] * Element[list2sum, n], n, 1, n_t - 1) → list3u
8. Element(list1, n_t) → h_c
9. RemoveUndefined(Sequence[If[abs(Element[list1, n]) > 0, Element[list3u, n], ""], n, 1, n_t - 1]) → list3
10. Length(list3) → n_{list3}
11. Textfield(f) → inputBox1
12. Textfield(p) → inputBox2
13. Element(list1, 3) → c
14. CoordinatePointeronAxisToolNew(P) → text2, text4, u, v, text5