(1) be a plane curve defined by
(b) ([10%])be a family of plane curves defined by where.Show that Ir intersects at exactly one point for each and the angle between the tangent vectors of andΓT at the intersection point is independent of T.
25. 右圖中,地球以橢圓軌道繞行太陽公轉而產生四季 變化,下表是關於此現象的許多數據。若太陽質量 為 M,地球質量為 m,問地球由春分繞行至冬至的 過程,太陽引力對於地球作功多少? (A) (B) (C) (D) (E)