A Transition to Advanced Mathematics
A Transition to Advanced Mathematics
8th Edition
ISBN: 9781285463261
Author: Douglas Smith, Maurice Eggen, Richard St. Andre
Publisher: Cengage Learning
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Chapter 7.2, Problem 12E

(a)

To determine

To prove: A{x} is open when A is open.

(b)

To determine

To prove: AB is open when A is open and B is closed.

(c)

To determine

To prove: BA is close when A is open and B is closed.

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A Transition to Advanced Mathematics

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