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6 Cards in this Set
 Front
 Back
A set is a (...) of objects.

(collection)
(family) (class) 

Word such as (...), (...), and (...) are often used synonymously with the word set.

(family)
(collection) (class) 

If x is a member of the set S, we denote that by x S,
where "" is the notation of "(...)". 
(is an element of)


If x is not a member of S, we denote that by (...)

(x / S)


We denote the set of all real numbers by (...)

(R)


Given two sets A and B, the collection of elements that belong to set A or set B is called the (...)

(Union of A and B)
