 Solution

ID: past-exam-of-the-mathematics-course-of-the-university-of-cambridge/2026/ii/paper-4/28l/d/solution

Codex  0 Created 2026-09-24 Updated 2026-09-25

Integrating gives

b (θ_{2}) - b (θ_{1}) \leq - (1 - γ) L

. Risk at the endpoints implies

∣ b (θ_{i}) ∣ \leq γ

, so the left side is at least

- 2 γ

. Hence

L \leq 2 γ / (1 - γ)

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