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March 1, 2015

March 1, 2015

Posted by **Anonymous** on Saturday, December 12, 2009 at 9:21am.

- Sets -
**Writeacher**, Saturday, December 12, 2009 at 9:26amB + C = A <~~Right?

A - B = C <~~??

What else can you come up with?

- Sets -
**Anonymous**, Saturday, December 12, 2009 at 9:31amA is a set of all letters in the alphabet and B is a set of vowels in the alphabet. What kind of relationship exists between the two sets? Also, if C is the set of consonants what is the relationship between B and C?

The relationship between set A and B are that all B is a subset of A?

The relationship between B and C are when B and C unite they equal set A...right?

- Sets -
**Writeacher**, Saturday, December 12, 2009 at 9:34amYes, both of those are correct.

- Sets -
**Writeacher**, Saturday, December 12, 2009 at 9:35amRemember correct grammar, though! "The relationship between set A and B is that..." ("Relationship" is the singular subject; therefore, the verb needs to be "is" not "are.")

- Sets -
**MathMate**, Saturday, December 12, 2009 at 9:47amYou can also add:

A⊃B : A is a superset of B

B∩C = ∅ : the intersection of B and C is an empty set.

Note the difference:

"B is**a**set of vowels", and

"C is**the**set of consonants"

So B may or may not contain all the vowels.

That makes

B∪C ⊆ A : The union of B and C is a subset or equal to A.

In the case of:

"B is**the**set of vowels in the alphabet" means that B contains all the vowels, then

A = B∪C

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