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圆盘法求旋转体体积 by Mike May (3)

圆盘法求旋转体体积 by Mike May (3)
几何画板及绘图内容加载中，请稍等……
2016-03-20 09:48
微积分积分几何作图滑块动画
所属专题 AP Calculus volume problems Calculus - Applications of Integrals - Areas and Volumes
该范例演示了2007年AP考试第1b题的旋转体体积计算。核心数学概念包括积分和旋转体体积。通过GeoGebra命令如Sequence、Polygon、Rotate、Integral等构建图形。适合高中数学教学和学习微积分中的积分应用。

GeoGebra 命令及参数

  1. Sequence(Polygon[(-2 + (k * h), f(-2 + ((k + p) * h))), (-2 + ((k + 1) * h), f(-2 + ((k + p) * h))), (-2 + ((k + 1) * h), g(-2 + ((k + p) * h))), (-2 + (k * h), g(-2 + ((k + p) * h)))], k, 0, m - 1) → Rectangles
  2. Polygon((-2 + (DK * h), f(-2 + ((DK + p) * h))), (-2 + ((DK + 1) * h), f(-2 + ((DK + p) * h))), (-2 + ((DK + 1) * h), g(-2 + ((DK + p) * h))), (-2 + (DK * h), g(-2 + ((DK + p) * h)))) → Rectangle1, b, c, d, e
  3. Rotate(Rectangle1, α, xAxis) → Rectangle1'
  4. Integral(A, -2, 2) → VolInteg
  5. RectangleSum(A, -2, -2 + (m * h), m, p) → WS
  6. Surface(u, (f(u) * cos(β)), (f(u) * sin(β)), u, -2, 2, β, 0, (2 * π)) → Inner
  7. Surface(u, (g(u) * cos(β)), (g(u) * sin(β)), u, -2, 2, β, 0, (2 * π)) → Outer
  8. Surface(-2 + (DK * h), (u * cos(β)), (u * sin(β)), u, f(-2 + ((DK + p) * h)), g(-2 + ((DK + p) * h)), β, 0, α) → SideLeft1
  9. Surface(-2 + ((DK + 1) * h), (u * cos(β)), (u * sin(β)), u, f(-2 + ((DK + p) * h)), g(-2 + ((DK + p) * h)), β, 0, α) → SideRight1
  10. Surface(-2 + u, (f(-2 + ((DK + p) * h)) * cos(β)), (f(-2 + ((DK + p) * h)) * sin(β)), u, (DK * h), ((DK + 1) * h), β, 0, α) → Inner1
  11. Surface(-2 + u, (g(-2 + ((DK + p) * h)) * cos(β)), (g(-2 + ((DK + p) * h)) * sin(β)), u, (DK * h), ((DK + 1) * h), β, 0, α) → Outer1
  12. Rotate(g_1, α, xAxis) → i
  13. Rotate(f_1, α, xAxis) → j
  14. Rotate(Rectangles, α, xAxis) → Rectangles'
  15. Sequence(Surface[-2 + u, (f(-2 + ((k + p) * h)) * cos(β)), (f(-2 + ((k + p) * h)) * sin(β)), u, (k * h), ((k + 1) * h), β, 0, α], k, 0, m - 1) → Inners
  16. Sequence(Surface[-2 + u, (g(-2 + ((k + p) * h)) * cos(β)), (g(-2 + ((k + p) * h)) * sin(β)), u, (k * h), ((k + 1) * h), β, 0, α], k, 0, m - 1) → Outers
  17. Sequence(Surface[-2 + (k * h), (u * cos(β)), (u * sin(β)), u, f(-2 + ((k + p) * h)), g(-2 + ((k + p) * h)), β, 0, α], k, 0, m - 1) → SidesLeft
  18. Sequence(Surface[-2 + ((k + 1) * h), (u * cos(β)), (u * sin(β)), u, f(-2 + ((k + p) * h)), g(-2 + ((k + p) * h)), β, 0, α], k, 0, m - 1) → SidesRight