有向数的加法 - 练习

GeoGebra 命令及参数

1. Point(xAxis) → B
2. If(x(B) - x(A) > 0, "+", "") → sign2
3. If(x(B) - x(A) < 0, "+", "") → sign3
4. If(x(A) > 0, "+", "") → signa
5. If(x(B) - x(A) > 0, "+", "") → signba
6. If(x(B) > x(A), "+", "-") → op2
7. If(x(B) > 0, "+", "") → signb
8. Sequence(Vector[(((k + x(A) - 0.05) * dis), 0.3), (((k + x(A)) * dis), 0.1)], k, 1, Div[x(B) - x(A), dis]) → l2
9. Sequence(Vector[(((x(A) - k + 0.05) * dis), 0.3), (((x(A) - k) * dis), 0.1)], k, 1, Div[x(A) - x(B), dis]) → l4
10. Corner(1) → C
11. If(num0 > 0, "+", "") → sign0
12. If(num1 > 0, "+", "") → sign1
13. Sequence(Semicircle[(((k - 0.9 + x(A)) * dis), 0.1), (((k + x(A)) * dis), 0.1)], k, 1, Div[x(B) - x(A), dis]) → l1
14. Sequence(Semicircle[(((x(A) - k) * dis), 0.1), (((x(A) + 0.9 - k) * dis), 0.1)], k, 1, Div[x(A) - x(B), dis]) → l3