 Solution

ID: past-exam-of-the-mathematics-course-of-the-university-of-cambridge/2026/ii/paper-4/33a/b/iii/solution

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

The weighted sum is

(2 ℓ + 2) (ℓ /2) + (2 ℓ) (- (ℓ + 1) /2) = 0

λ ℏ^{2}

, so the centre of gravity is unchanged.

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