使用图像解二次不等式

GeoGebra 命令及参数

1. Random(1, 5) → qq
2. If(Random[1, 4] < 4, "+", "-") → asign
3. If(p + qq ≟ 0, Random[1, 5], p + qq) → q
4. Random(1, 5) → r
5. Random(0, 1) → ineq
6. Random(0, 1) → eq
7. If(ineq ≟ 0, If[eq ≟ 0, "<", "≤"], If[eq ≟ 0, ">", "≥"]) → eqtext
8. Segment(E, F) → c
9. Point(c) → A
10. Point(c) → B
11. Textfield(pz) → InputBox1
12. Textfield(qz) → InputBox2
13. If(eq ≟ 0, "<", "≤") → regeq
14. If(eq ≟ 0, ">", "≥") → regeq2
15. Textfield(answ1) → InputBox3
16. Textfield(answ2) → InputBox4
17. If(pz ≟ p ∧ qz ≟ q ∨ pz ≟ q ∧ qz ≟ p, "✔", "X") → chk1
18. If(eq ≟ 0 ∧ e ≟ false ∨ eq ≟ 1 ∧ e ≟ true, "✔", "X") → chk2
19. If(asign ≟ "+" ∧ a ≟ true ∨ asign ≟ "-" ∧ a ≟ false, "✔", "X") → chk3
20. If(ineq ≟ 1 ∧ b ≟ true ∨ ineq ≟ 0 ∧ b ≟ false, "✔", "X") → chk4
21. If(asign ≟ "+" ∧ ineq ≟ 1 ∧ d ≟ false ∨ asign ≟ "+" ∧ ineq ≟ 0 ∧ d ≟ true ∨ asign ≟ "-" ∧ ineq ≟ 1 ∧ d ≟ true ∨ asign ≟ "-" ∧ ineq ≟ 0 ∧ d ≟ false, "✔", "X") → chk5
22. If(answ1 ≟ p ∧ answ2 ≟ q, "✔", "X") → chk6