Define a function ?
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the purpose or special duty of a person or thing
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Answer:-. Function-- If X,Y are two non-empty sets then a subset f of X*Y is called a function or mapping or map from X to Y iff for each "x" belongs to "X", there exists a unique "y" belong to "Y" such that (x,y) belong to "f". It is written as
f:X—>Y.
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