二项式系数与树状图

GeoGebra 命令及参数

1. SelectedElement(List) → n_v
2. Point(yAxis) → A
3. Point(yAxis) → B
4. Point(yAxis) → C
5. Intersect(xAxis, yAxis) → D
6. Point(yAxis) → E
7. Point(yAxis) → G
8. Point(yAxis) → H
9. Segment(A, I) → f
10. Segment(I, B) → g
11. Segment(C, J) → h
12. Segment(J, D) → i
13. Segment(E, K) → j
14. Segment(K, F) → k
15. Segment(G, L) → l
16. Segment(L, H) → m
17. Segment(M, L) → p
18. Segment(I, N) → q
19. Segment(N, J) → r
20. Segment(N, O) → s
21. Segment(O, M) → t
22. Segment(C, P) → a
23. Segment(C, Q) → b
24. Segment(D, R) → c
25. Segment(D, S) → d
26. Segment(E, T) → e
27. Segment(E, U) → f_1
28. Segment(F, V) → g_1
29. Segment(F, W) → h_1
30. Segment(B, Z) → i_1
31. Segment(B, A_1) → j_1
32. Segment(A, B_1) → k_1
33. Segment(A, C_1) → l_1
34. Segment(G, D_1) → m_1
35. Segment(G, E_1) → n_1
36. Segment(H, F_1) → p_1
37. Segment(H, G_1) → q_1
38. Segment(H_1, G_1) → r_1
39. Segment(G_1, I_1) → s_1
40. Segment(F_1, J_1) → t_1
41. Segment(F_1, K_1) → a_1
42. Segment(E_1, L_1) → b_1
43. Segment(E_1, M_1) → c_1
44. Segment(D_1, N_1) → d_1
45. Segment(D_1, O_1) → e_1
46. Segment(W, P_1) → f_2
47. Segment(W, Q_1) → g_2
48. Segment(V, R_1) → h_2
49. Segment(V, S_1) → i_2
50. Segment(U, T_1) → j_2
51. Segment(U, U_1) → k_2
52. Segment(T, V_1) → l_2
53. Segment(T, W_1) → m_2
54. Segment(S, Z_1) → n_2
55. Segment(S, A_2) → p_2
56. Segment(R, B_2) → q_2
57. Segment(Q, C_2) → r_2
58. Segment(Z, D_2) → s_2
59. Segment(C_1, E_2) → t_2
60. Segment(A_1, F_2) → a_2
61. Segment(P, G_2) → b_2
62. Segment(Q, H_2) → c_2
63. Segment(R, I_2) → d_2
64. Segment(P, J_2) → e_2
65. Segment(A_1, K_2) → f_3
66. Segment(Z, L_2) → g_3
67. Segment(C_1, M_2) → h_3
68. Segment(B_1, N_2) → i_3
69. Segment(B_1, O_2) → j_3
70. Binomial(n, 1) → choose1
71. Binomial(n, 2) → choose2
72. Segment(M, K) → k_3
73. Binomial(n, 4) → choose4
74. Binomial(n, 3) → choose3
75. Binomial(n, 0) → choose0
76. Binomial(n, 5) → choose5