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ID: past-exam-of-the-mathematics-course-of-the-university-of-cambridge/2023/ia/paper-4/8d/iii/solution

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Past exam of the mathematics course of the University of Cambridge / 2023 / ia / Paper 4 / 8D / iii / Solution by

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

All binary sequences are uncountable, while part (ii) accounts for the sequences which fail to have infinitely many symbols of both kinds and is countable. Removing that countable subset leaves an uncountable set.

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