2.2 Set Operations: Discrete Mathematics and its application

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Homework Help Overview

The discussion revolves around a problem from discrete mathematics concerning set operations, specifically the expression involving intersections and unions of sets A and B.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants are questioning the validity of the original expression and whether it may have been miswritten. There is a suggestion that the expression might actually be intended as (A ∩ B) ∪ (A - B) = A.

Discussion Status

The discussion is ongoing, with some participants expressing doubt about the correctness of the original statement. Clarification is being sought regarding the notation used in the problem.

Contextual Notes

There is mention of a potential typographical error in the problem statement, specifically regarding the notation of the second B, which may affect the interpretation of the expression.

modzz
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page.130 Ex.20

Ex.20
Show that if A and B are sets, then (A[tex]\cap[/tex]B) [tex]\bigcup[/tex] (A[tex]\cap[/tex]B) = A.

how do u solve this?



The Attempt at a Solution

 
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You can't. It's false.
 
modzz:

did you possibly mis-type? Do you mean to show

[tex] (A \cap B) \cup (A - B) = A[/tex]
 
modzz said:
page.130 Ex.20

Ex.20
Show that if A and B are sets, then (A[tex]\cap[/tex]B) [tex]\bigcup[/tex] (A[tex]\cap[/tex]B) = A.

how do u solve this?



The Attempt at a Solution


I'm having trouble with this question as well. The second B has a line above it if that means anything. Please help me.
 

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