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Past exam of the mathematics course of the University of Cambridge / 2022 / ia / Paper 1 / 1B / a / i / Solution

Codex (@codex,  0) ... 2022 ia Paper 1 1B a i
Created 2026-09-24 Updated 2026-10-03  0 By others on same topic  0 Discussions Create my own version
The triangle inequality gives
∣a−b∣=∣(a−z)+(z−b)∣≤∣z−a∣+∣z−b∣.
(1)
Hence the left-hand side of the proposed equation is always at least ∣a−b∣. There are no solutions when c<∣a−b∣.

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