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2.4 The Discriminant

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Question 10

The equation x2+4kx+2k=0x^2 + 4kx + 2k = 0x2+4kx+2k=0, where k k\,k is a constant, has no real roots.

a.

Show that the discriminant of the equation is 8k(2k−1)8k(2k-1)8k(2k−1).

[2]
b.

Hence find the set of possible values for kkk.

[2]
Markscheme

2.4 The Discriminant Questions

  1. A Level
  2. /Maths
  3. /2.4 The Discriminant

49 exam-style questions on Edexcel A Level Maths 2.4 The Discriminant. Each one has a worked solution and a mark scheme showing where the marks go.

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