二项分布（动态视窗）

GeoGebra 命令及参数

1. Point(xAxis) → A
2. Point(xAxis) → B
3. Max(x(A), x(B)) → b
4. Sequence(((nCr[n, r] * p^(r)) * (1 - p)^(n - r)), r, 0, n) → P
5. Sequence(k, k, 0, n) → X
6. Min(x(A), x(B)) → a
7. Sequence(Segment[(i, 0), (i, g(i))], i, 0, n, 1) → Lines
8. Sequence(Polygon[(i - 0.5, 0), (i + 0.5, 0), (i + 0.5, g(i)), (i - 0.5, g(i))], i, 0, n, 1) → Bars
9. If(b < n, floor(b), n) → b'
10. If(a > 0, ceil(a), 0) → a'
11. Take(Bars, a' + 1, b' + 1) → BarsP
12. Max(Lines) → m