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5
avatar+564 

Hey, could someone explain what these symbols are? I came over these problems while reviewing Algebra 2 

 

 

 

 

chilledz3non  Feb 9, 2016

Best Answer 

 #5
avatar+87604 
+5

∩  means "intersection"......it is defined as the set of all the elements common to some n sets

 

U  means "union".......it is  the set composed of all the elements of n sets

 

A  =  { 1,2,3,4}

 

B = { 2,3,5, 6}

 

C = {3,4,6,7}

 

So.....B ∩ C  =  { 3, 6 } = {6, 3} [ the order doesn't matter]     "A"  is the answer

 

And  C U A  = { 1,2,3,4,6,7}   "E"  is the answer

 

 

 

cool cool cool

CPhill  Feb 9, 2016
 #1
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0

8=D

Guest Feb 9, 2016
 #2
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+5

Introducing Math Symbols for Union and Intersection.  “There are two sets of symbols for 'union' and 'intersection'. One is the ∪ (union) and the upside down ∩ (intersection), and the other set is the ∨ and the ∧.

Guest Feb 9, 2016
edited by Guest  Feb 9, 2016
 #3
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The anserwer is 6

Guest Feb 9, 2016
 #4
avatar+564 
0

Thanks so much guys

chilledz3non  Feb 9, 2016
 #5
avatar+87604 
+5
Best Answer

∩  means "intersection"......it is defined as the set of all the elements common to some n sets

 

U  means "union".......it is  the set composed of all the elements of n sets

 

A  =  { 1,2,3,4}

 

B = { 2,3,5, 6}

 

C = {3,4,6,7}

 

So.....B ∩ C  =  { 3, 6 } = {6, 3} [ the order doesn't matter]     "A"  is the answer

 

And  C U A  = { 1,2,3,4,6,7}   "E"  is the answer

 

 

 

cool cool cool

CPhill  Feb 9, 2016

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