2. The number of elements in a set A is written as n(A).
Give the value of n(A) for the finite sets in questions la-k
above.
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the cardinal number, or cardinality, of the set.
Step-by-step explanation:
Definition: The number of elements in a set is called the cardinal number, or cardinality, of the set. This is denoted as n(A), read “n of A” or “the number of elements in set A.” Page 9 Example. Find the cardinal number of each set. (a) The set A of counting numbers between ten and twenty.
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