椭圆方程绘制练习

GeoGebra 命令及参数

1. RandomElement(L_4) → s
2. Random(-9, 9) → k1
3. Random(-9, 9) → h
4. If(k1 ≟ 0 ∧ h ≟ 0, k1 + 1, k1) → k
5. Random(1, 6) → n
6. Element(L_3, n) → a
7. Element(L_2, n) → b
8. Element(L_1, n) → c
9. If(k > 0, "(" + "y-" + k + ")²", If[k < 0, "(" + "y+" + (((-k) * ")²")), "y²"]) → text2
10. If(h > 0, "(" + "x-" + h + ")²", If[h < 0, "(" + "x+" + (((-h) * ")²")), "x²"]) → text1
11. If(h > 0, "(" + "x+" + h + ")²", If[h < 0, "(" + "x-" + (((-h) * ")²")), "x²"]) → text3
12. If(k > 0, "(" + "y+" + k + ")²", If[k < 0, "(" + "y-" + (((-k) * ")²")), "y²"]) → text4
13. If(h > 0, "-" + (abs(((2 * h) * b2))) + "x", If[h < 0, "+" + (abs(((2 * h) * b2))) + "x", ""]) → text10
14. If(d < 0, "-" + (abs((-d))), If[d > 0, "+" + d, ""]) → text12
15. If(k > 0, "-" + (abs(((2 * k) * a2))) + "y", If[k < 0, "+" + (abs(((2 * k) * a2))) + "y", ""]) → text11
16. If(h > 0, "-" + (abs(((2 * h) * a2))) + "x", If[h < 0, "+" + (abs(((2 * h) * a2))) + "x", ""]) → text15
17. If(k > 0, "-" + (abs(((2 * k) * b2))) + "y", If[k < 0, "+" + (abs(((2 * k) * b2))) + "y", ""]) → text16
18. If(e < 0, "-" + (abs((-e))), If[e > 0, "+" + e, ""]) → text17
19. If(e1 < 0, "-" + (abs((-e1))), If[e1 > 0, "+" + e1, ""]) → text171
20. If(d1 < 0, "-" + (abs((-d1))), If[d1 > 0, "+" + d1, ""]) → text121
21. If(n_1 ≟ 1, Random[1, 2], If[n_1 ≟ 2, Random[3, 4], Random[1, 4]]) → f
22. If(f ≟ 1, t01, If[f ≟ 2, t21, If[f ≟ 3, t11, t31]]) → t001
23. If(f ≟ 1, t02, If[f ≟ 2, t22, If[f ≟ 3, t12, t32]]) → t002
24. If(f ≟ 1, t03, If[f ≟ 2, t23, If[f ≟ 3, t13, t33]]) → t003
25. If(f ≟ 1, t04, If[f ≟ 2, t24, If[f ≟ 3, t14, t34]]) → t004
26. Random(1, 4) → i
27. Ellipse(FX1, FX2, a) → p
28. Ellipse(FY1, FY2, a) → q
29. If(g ≟ 1, "A", If[g ≟ 2, "B", If[g ≟ 3, "C", "D"]]) → text44
30. If(i ≟ 1, "A", If[i ≟ 2, "B", If[i ≟ 3, "C", "D"]]) → text45
31. If(n_1 ≟ 1, "สมการมาตรฐาน", If[n_1 ≟ 2, "สมการทั่วไป", "แบบระคน"]) → text48