Problem 6. Let S CR. (i) Prove that an isolated point of S is a boundary point of S. (ii) Prove that a boundary point of S is either an accumulation point of S or an isolated point of S.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.4: Values Of The Trigonometric Functions
Problem 23E
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Problem 6. Let S CR.
(i) Prove that an isolated point of S is a boundary point of S.
(ii) Prove that a boundary point of S is either an accumulation point of S
or an isolated point of S.
Transcribed Image Text:Problem 6. Let S CR. (i) Prove that an isolated point of S is a boundary point of S. (ii) Prove that a boundary point of S is either an accumulation point of S or an isolated point of S.
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