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| PAGE: 194 | SET: Exercises | PROBLEM: 8 |
Definition of a function :
A function is a special type of relation in which each element of the domain is paired with exactly one element of the range.
The relation in figure is not a function because each element in the domain does not corresponds to exactly one element in the range.
The domain of the function is 
.
The range of the function is 
.
The element
of the domain is paired with more than one element of the range, i.e, 
and 
.
Thus, the relation in figure is not a function.
The relation in figure is not a function.
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