 Solution

ID: past-exam-of-the-mathematics-course-of-the-university-of-cambridge/2022/ii/paper-2/32e/a/i/solution

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

lo g (cos u) \sim - \frac{u ^{2}}{2} (u \to 0),

one has

\frac{ϕ _{n + 1} ( x )}{ϕ _{n} ( x )} \sim x^{2} ⟶ 0.

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