Thursday, November 4, 2010

Definition of the Domain of a Function

Definition of the Domain of a Function
For a function f defined by an expression with variable x, the implied domain of f is the set of all real numbers variable x can take such that the expression defining the function is real. The domain can also be given explicitly.
Definition of the Range of a Function The range of f is the set of all values that the function takes when x takes values in the domain.

Example 1: Find the domain of function f defined by


f (x) = 1 / ( x - 1)

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