Give definition of a function. - Vidyadip

Question

Give definition of a function.

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Answer

If $A$ and $B$ are any two non-empty sets and each element of set $A$ is related with one and only one element of set $B$ by some rule, relation or correspondence, then It is called a function from set $A$ to $B$ and is denoted by $f: A \rightarrow B$.

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