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A-LevelFurther MathematicsVectors9231/12 · Oct/Nov 2024 · Q27 Marks

The line l₁ has equation r = i+3j-k+λ(i−j−4k). The plane Π contains l₁ and is parallel to the vector 2i+5j-4k. The line l₂ is parallel to the vector 5i – 5j – 2k.

  1. (a)Find the equation of Π, giving your answer in the form ax+by+cz = d.[4]
  2. (b)Find the acute angle between l₂ and Π.[3]

Mark scheme

Marking points from the official mark scheme (Oct/Nov 2024). The mark or mark type is shown in brackets.

  1. [M1 A1] Finds vector perpendicular to the plane.
  2. [M1 A1] Uses point in the plane.
  3. [M1A1FT] Uses dot product of 5i-5j-2k and their normal.
  4. [A1] 0.744 radians

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About this question

Topic
Vectors, A-Level Further Mathematics (syllabus 9231). Structured question, 7 marks.
Source
A-Level Further Mathematics, Oct/Nov 2024 Paper 1 Variant 2, question 2.

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