Show that both R and R² may be covered by countably many open balls.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section10.7: Distinguishable Permutations And Combinations
Problem 22E
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Show that both ℝ and ℝ2 may be covered by countably many open balls.

Show that both R and R² may be covered by countably many open balls.
Transcribed Image Text:Show that both R and R² may be covered by countably many open balls.
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