Numerical Function

Numerical Function

Function that takes on values in a set of numbers.

A numerical function does not necessarily have a set of numbers as a domain, as is the case in probability; however, its image is always a set of numbers.


  • The relation that associates a whole number with twice its value is a numerical function.
    It can be defined as follows: \(f : \mathbb{N} → \mathbb{N}\space | \space f(x) = 2x\).
    The domain of this function is W and its image is the set of even numbers.
  • If the cards in a standard deck of 52 playing cards are given a specific value, such that:
    • the value of all the cards except for the face cards is written on the cards (2 to 10),
    • the face cards have a value of 11,
    • the aces have a value of 12,

    then this distribution of points is a numerical function in which the elements of the domain are not numbers.

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