函数的定义域与值域：快速问答与示例

GeoGebra 命令及参数

1. Random(-6, 6) → a
2. Random(-6, 7) → c
3. Random(a + 1, 7) → b
4. Random(c + 1, 7) → d
5. Segment(A, B) → f
6. Segment(C, D) → g
7. Point(xAxis) → E
8. Point(Ray[E, E + (1, 0)]) → F
9. Segment(E, F) → h
10. Point(yAxis) → G
11. Point(Ray[G, G + (0, 1)]) → H
12. Segment(G, H) → i
13. Random(1, 2) → n
14. Min(y(C), y(D)) → r
15. Max(y(C), y(D)) → s