用棱柱近似二重积分

GeoGebra 命令及参数

1. Polygon(P_1, P_2, P_4, P_3) → q1, p_1, p_2, p_4, p_3
2. Textfield(a) → InputBox1
3. Textfield(b) → InputBox2
4. Textfield(c) → InputBox3
5. Textfield(d) → InputBox4
6. Textfield(f) → InputBox5
7. Sequence(Sequence[Prism[Polygon[(a + (i * d_x), c + (j * d_y)), (a + ((i + 1) * d_x), c + (j * d_y)), (a + ((i + 1) * d_x), c + ((j + 1) * d_y)), (a + (i * d_x), c + ((j + 1) * d_y)), (a + (i * d_x), c + (j * d_y))], f((a + (i * d_x) + a + ((i + 1) * d_x)) / 2, (c + (j * d_y) + c + ((j + 1) * d_y)) / 2)], i, 0, n - 1], j, 0, n - 1) → L_1