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2.2 Set Operations: Discrete Mathematics and its application

  • Thread starter modzz
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  • #1
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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

 

Answers and Replies

  • #2
Dick
Science Advisor
Homework Helper
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You can't. It's false.
 
  • #3
statdad
Homework Helper
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modzz:

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

[tex]
(A \cap B) \cup (A - B) = A
[/tex]
 
  • #4
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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

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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