 Solution

ID: past-exam-of-the-mathematics-course-of-the-university-of-cambridge/2026/ii/paper-3/27k/d/solution

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

ξ_{1} \leq C

, then

t < T_{N_{t} + 1} \leq t + C

. Taking expectations and using (b) yields

λ t - 1 < E N_{t} \leq λ (t + C) - 1

. Divide by

t

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