1. Let X be the set of real numbers with the usual pseudometric. Find the derived set and the closure of each of the following sets: (a) A = {1/n: n = 1,2,3,...); (b) B= Z, the integers; (c) C= Q, the rational numbers.
1. Let X be the set of real numbers with the usual pseudometric. Find the derived set and the closure of each of the following sets: (a) A = {1/n: n = 1,2,3,...); (b) B= Z, the integers; (c) C= Q, the rational numbers.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Transcribed Image Text:1. Let X be the set of real numbers with the usual pseudometric. Find the
derived set and the closure of each of the following sets:
(a) A = {1/n: n = 1,2,3,...);
(b) BZ, the integers;
(c) C = Q, the rational numbers.
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