线性方程组的图解求解练习

GeoGebra 命令及参数

1. Random(-10, 10) → a
2. Random(-10, 10) → b
3. Random(-10, 10) → c
4. Line(A, B) → f
5. Sequence(i, i, -10, y(B) - 1, 1) → dlower
6. Sequence(i, i, y(B) + 1, 10, 1) → dupper
7. Union(dlower, dupper) → dlist
8. RandomElement(dlist) → d
9. Line(A, C) → g
10. Slope(f) → e
11. Slope(g) → h
12. FractionText(e) → text1
13. FractionText(h) → text2
14. Line(D, E) → i
15. Line(G, F) → j
16. Textfield(k) → InputBox1
17. Textfield(l) → InputBox2