二次不等式作图

GeoGebra 命令及参数

1. Random(1, 4) → j
2. Random(1, 4) → i
3. RandomElement(L_4) → d
4. RandomElement(L_3) → c
5. RandomElement(L_2) → b
6. If(f > 0, "+" + f, "" + f) → text3
7. RandomElement(L_1) → a
8. If(e ≟ 1, "+x", If[e ≟ -1, "-x", If[e > 1, "+" + e + "x", e + "x"]]) → text2
9. If(ac ≟ 1, "x^2", ac + "x^2") → text1
10. If(g > h, g, h) → m
11. If(g > h, h, g) → n
12. FractionText(n) → text9
13. FractionText(m) → text10
14. If(j ≟ 1, j1, If[j ≟ 2, j2, If[j ≟ 3, j3, j4]]) → jot
15. If(j ≟ 1, t1, If[j ≟ 2, t2, If[j ≟ 3, t3, t4]]) → to
16. If(j ≟ 1, t2, If[j ≟ 2, t3, If[j ≟ 3, t4, t1]]) → to1
17. If(j ≟ 1, t3, If[j ≟ 2, t4, If[j ≟ 3, t1, t2]]) → to2
18. If(j ≟ 1, t4, If[j ≟ 2, t1, If[j ≟ 3, t2, t3]]) → to3
19. If(i ≟ 1, "A", If[i ≟ 2, "B", If[i ≟ 3, "C", "D"]]) → text26
20. If(l ≟ 1, "A", If[l ≟ 2, "B", If[l ≟ 3, "C", "D"]]) → text27
21. If(l ≟ i, "ข้อ\;" + text27 + "\;ถูกต้อง", "ข้อ\;" + text27 + "\;ผิด") → text28
22. If(a ≟ 1, "(x", "(" + a + "x") → t11
23. If(b > 0, "+" + b + ")", b + ")") → t12
24. If(c ≟ 1, "(x", "(" + c + "x") → t21
25. If(d > 0, "+" + d + ")", d + ")") → t22
26. If(j ≟ 1, "< 0", If[j ≟ 2, "≤0", If[j ≟ 3, ">0", "≥0"]]) → sig
27. Vector(A, B) → u
28. Vector(C, D) → v
29. Segment(A, C) → t