3.1.Ðåøèòå ñèñòåìó íåðàâåíñòâî ;
3.2 The line l has equation r = j + k + s (i – 2j + k). The plane p has equation .
(i) Show that the line l lies in the plane p
(2)
(ii) A second plane is perpendicular to the plane p, parallel to the line l and contains the point with position vector 2i + j +4k. Find the equation of this plane, giving your answer in the form .