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A-LevelFurther MathematicsMatricesMay/June 2015Paper 1 Q1012 Marks

The matrix A is given by A = [[2, 2, -3], [2, 2, 3], [-3, 3, 3]] The matrix A has an eigenvector [[1], [-1], [1]]. Find the corresponding eigenvalue. The matrix A also has eigenvalues 4 and 6. Find corresponding eigenvectors. Hence find a matrix P such that A = PDP⁻¹, where D is a diagonal matrix which is to be determined. The matrix B is such that B = QAQ⁻¹, where Q = [[4, 1, 5], [1, 4, 2], [1, 2, 1]] By using the expression PDP⁻¹ for A, find the set of eigenvalues and a corresponding set of eigenvectors for B.

📋 Examiner Report & Trap Analysis

Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...

🎯 Mark Scheme Breakdown

Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.

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About This A-Level Further Mathematics Question

Topic

This structured question tests Matrices in A-Level Further Mathematics (syllabus code 9231). It is worth 12 marks.

Source

This question appeared in the Cambridge A-Level Further Mathematics May/June 2015 examination, Paper 1 Variant 2.

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