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What is domain and range

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What is domain and range
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Yogita Ingle 5 years, 10 months ago

Domain – The input values in a given function is called Domain of a function. The values that go into function is called domain.
Example : Determine the domain of the following relations
1. {(1, 2) (1, 4) (1, 6) (1, 8)}
Domain = {1}
Range: Let A and B be two sets. Relation from A into B is a subset of AxB. Let R be a relation from A into B. If (a, b) ∈ R, we say that ‘a’ is related to b with respect to R. the set of all those elements a ∈A. Such that (a, b) ∈R for some b∈B is called the domain of R and Range of R to be the subsets of B = {b∈B (a, b) ∈R for some a∈A} B is called the co-domain of R.
Example 1: Determine the range { (1, 2) (1, 4) (1, 6) (1, 8)}
Solution: Range = {2, 4, 6, 8}
 

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