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O-LevelAdditional MathematicsQuadratic functions4037/11 · May/June 2010 · Q35 Marks

Find the set of values of k for which the equation x2 + (k – 2)x + (2k – 4) = 0 has real roots.

Mark scheme

Marking points from the official mark scheme (May/June 2010). The mark or mark type is shown in brackets.

  1. [1] M1 for use of discriminant; A1 for 3 term quadratic in k
  2. [1] M1 for attempt to solve quadratic
  3. [1] A1 for critical values
  4. [1] A1 for range

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About this question

Topic
Quadratic functions, O-Level Additional Mathematics (syllabus 4037). Structured question, 5 marks.
Source
O-Level Additional Mathematics, May/June 2010 Paper 1 Variant 1, question 3.

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