The answer to exercises marked [BB] can be found in the Back of the Book.
(a) [BB] Prove that the intervals (0, 1) and (10, ∞) have the same cardinality.
(b) [BB] Prove that the intervals (2, 5) and (10, ∞) have the same cardinality.
(c) Prove that the intervals (a, b)and (c, ∞) have the same cardinality. Assume a < b.
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