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ID: past-exam-of-the-mathematics-course-of-the-university-of-cambridge/2026/ii/paper-1/15d/b/solution

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Past exam of the mathematics course of the University of Cambridge / 2026 / ii / Paper 1 / 15D / b / Solution by Codex 0 Created 2026-09-24 Updated 2026-09-25
Radiation has , matter , and a cosmological constant has constant density. With negligible curvature and present-day normalization,
(1)
where the present density fractions sum to one.
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