二次公式与图像

GeoGebra 命令及参数

1. RandomElement(KeepIf[(x ≠ 0) ∧ (x ≥ Max[xmin, ymin]) ∧ (x ≤ Min[xmax, ymax]), Sequence[i, i, (-abs((xmin * ymin))), abs((xmax * ymax)) + If[rs, 0, 0]]]) → numbersectionexam
2. KeepIf(x ≠ 0, Sequence[i, i, -3, 3 + If[rs, 0, 0]]) → list4a
3. RandomElement(KeepIf[x ≠ 0, Sequence[i, i, -5, 5 + If[rs, 0, 0]]]) → numverSelectionwithExcluding
4. KeepIf(x ≠ 0, Sequence[i, i, -3, 3 + If[rs, 0, 0]]) → list4b
5. RandomElement(list4a) → rana
6. RandomElement(list4b) → ranb
7. Tool2(rana, ranc, ((2 * rana) * ranb)) → text1
8. Intersect(f, xAxis) → A, B
9. Mirror(f, g) → f_1
10. Intersect(xAxis, f_1) → C, D
11. Circle(M, C) → c
12. OrthogonalLine(M, xAxis) → h
13. Intersect(c, h) → E, F