数线上位置表示分数与小数

GeoGebra 命令及参数

1. Point(yAxis) → B
2. Segment((0, -0.55), (0, -0.8)) → b
3. Sequence(Segment[(i, 0), (i, -1 * 0.25)], i, 0, 4) → list6
4. Sequence(Segment[((2 * i - 1) / 2, 0), ((2 * i - 1) / 2, -1 * 0.2)], i, 1, 4) → list7
5. Sequence(Sequence[Segment[(i / 2 + 0.1 * j, 0), (i / 2 + 0.1 * j, -1 * 0.15)], j, 1, 4], i, 0, 7) → list8
6. Sequence(Sequence[Segment[(i / 20 + 0.01 * j, 0), (i / 20 + 0.01 * j, -1 * 0.06)], j, 1, 4], i, 0, 79) → list9
7. Sequence(Segment[((2 * i - 1) / 20, 0), ((2 * i - 1) / 20, -1 * 0.1)], i, 1, 40) → list10
8. Point(Sequence[(i, L / 2), i, 0, 4, 0.01]) → A
9. Vector((0, 0), (4.15, 0)) → a
10. Vector(A, (x(A), 0)) → u
11. Point(Sequence[(i, L / 2), i, 0, 4, 0.01]) → A'
12. Vector(A', (x(A'), 0)) → v