Exercise 3.2.8. Assume A is an open set and B is a closed set. Determine if the following sets are definitely open, definitely closed, both, or neither. (a) AUB (b) A\B = {x A: x B} (c) (AUB) (d) (An B) U (AcnB) (e) únAc

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter3: Functions And Graphs
Section3.2: Graphs Of Equations
Problem 68E
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Exercise 3.2.8. Assume A is an open set and B is a closed set. Determine if
the following sets are definitely open, definitely closed, both, or neither.
(a) AUB
(b) A\B = {x A: x B}
(c) (AUB)
(d) (An B) U (AcnB)
(e) únAc
Transcribed Image Text:Exercise 3.2.8. Assume A is an open set and B is a closed set. Determine if the following sets are definitely open, definitely closed, both, or neither. (a) AUB (b) A\B = {x A: x B} (c) (AUB) (d) (An B) U (AcnB) (e) únAc
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