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A-LevelFurther MathematicsMatrices9231/12 · Oct/Nov 2018 · Q59 Marks

The linear transformation T : R⁴ → R⁴ is represented by the matrix M, where M = 3 2 0 1 6 5 -1 3 9 8 -2 5 -3 -2 0 -1

  1. (i)Find the rank of M.[3]
  2. (ii)Let K be the null space of T. Find a basis for K.[3]
  3. (iii)Find the general solution of Mx = (2 5 8 -2) [3]

Mark scheme

Marking points from the official mark scheme (Oct/Nov 2018). The mark or mark type is shown in brackets.

  1. [M1] Attempt to row reduction.
  2. [A1] Two correct rows only
  3. [A1] Obtains rank.
  4. [M1] Solves homogeneous system of equations.
  5. [M1] Using 2 parameters
  6. [A1] AEF
  7. [B1] Finds a particular solution.
  8. [M1] Using correct format
  9. [A1FT]

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About this question

Topic
Matrices, A-Level Further Mathematics (syllabus 9231). Structured question, 9 marks.
Source
A-Level Further Mathematics, Oct/Nov 2018 Paper 1 Variant 2, question 5.

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