偏导数与切平面 by R Vozzo

GeoGebra 命令及参数

1. Textfield(f) → InputBox1
2. Plane((a, 0, 1), L_x) → P_x
3. Plane((0, b, 1), L_y) → P_y
4. CurveCartesian(t, b, f(t, b), t, -100, 100) → f_{resy}
5. Derivative(f, x) → f_x
6. Derivative(f, y) → f_y
7. Vector((1, 0, f_{xat(a,b)})) → v_x
8. Vector((0, 1, f_{yat(a,b)})) → v_y
9. Line((a, b, f(a, b)), v_y) → T_y
10. Line((a, b, f(a, b)), v_x) → T_x
11. Plane(T_x, T_y) → T_f
12. CurveCartesian(a, t, f(a, t), t, -100, 100) → f_{resx}