函数极值问题演示

GeoGebra 命令及参数

1. Derivative(f, x) → f'_x
2. Derivative(f, y) → f'_y
3. CurveCartesian(t, 1, f(t, 1), t, -10, 10) → k1_x
4. CurveCartesian(t, -1, f(t, -1), t, -10, 10) → k2_x
5. CurveCartesian(1, t, f(1, t), t, -10, 10) → k1_y
6. CurveCartesian(-1, t, f(-1, t), t, -10, 10) → k2_y
7. PointIn(f) → P
8. CurveCartesian(t, y(P), f(t, y(P)), t, -10, 10) → kx_P
9. CurveCartesian(x(P), t, f(x(P), t), t, -10, 10) → ky_P
10. Derivative(f, x, 2) → f''_x
11. Derivative(f, y, 2) → f''_y
12. Derivative(f'_x, x) → f_{xx}