旋转体的简单体积

GeoGebra 命令及参数

1. Intersect(f, i, (2.3, 2.5262176968031724)) → A
2. Intersect(i, xAxis) → B
3. Segment(A, B) → j
4. Segment(A, B) → l
5. Circle(xAxis, A) → c
6. Textfield(f) → InputBox1
7. CurveCartesian(t, f(t), t, a, b) → d
8. Surface(d, p, m) → e
9. CurveCartesian(a, (t * f(a)), t, 0, 1) → n
10. CurveCartesian(b, (t * f(b)), t, 0, 1) → o
11. Surface(n, p, m) → q
12. Surface(o, p, m) → r