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Question
Describe the following sets in set-builder form:
C = {0, 3, 6, 9, 12, ...}
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Solution
Set-builder form:
To describe a set, a variable x (each element of the set) is written inside braces. Then, after putting a colon, the common property P(x) possessed by each element of the set is written within braces.
\[ {x: x = 3n, n \in Z^+}\]
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