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Question 72

Prove that (7n+1)2−(7n−1)2(7n + 1)^2 - (7n - 1)^2(7n+1)2−(7n−1)2 is always a multiple of 28, for all positive integer values of nnn.

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Markscheme

Proof Questions

  1. GCSE
  2. /Maths
  3. /Proof

207 exam-style questions on OCR GCSE Maths Proof. Each one has a worked solution and a mark scheme showing where the marks go.

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