Functions and Mappings: Core Concepts

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Multiple Choice

What is a function?

  1. A relation between two sets where each element of the first set is paired with exactly one element of the second set
  2. A relation between two sets where each element of the first set is paired with at least one element of the second set
  3. A relation between two sets where each element of the first set is paired with at most one element of the second set
  4. A relation between two sets where each element of the first set is paired with more than one element of the second set
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