4 (b) The line / has equation r=-5+ a 3 The line 12 has equation r = -8-8 The point P lies on ₁ where a = -1. The point

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4 B The Line Has Equation R 5 A 3 The Line 12 Has Equation R 8 8 The Point P Lies On Where A 1 The Point 1 (28.52 KiB) Viewed 9 times

4 (b) The line / has equation r=-5+ a 3 The line 12 has equation r = -8-8 The point P lies on ₁ where a = -1. The point Q lies on 12 where ß = 2. (i) H (ii) (iii) Show that PQ is parallel to (4 marks) The ₁ and 2 intersects at the point R (3, b, c). Show that b value of c. (4 marks) The point S lies on a line through P that is parallel to 12. The line RS is perpendicular to line PQ. Calculate the position vector of S. (5 marks) 12 = -2 and find the