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Answer:

a technical definition of a function is: a relation from a set of inputs to a set of possible outputs where each input is related to exactly one output. we can write the statement that f is a function from x to y using the function notation F:X~F

a relation from a set of inputs to a set of possible outputs where each input is related to exactly one output. ... We can write the statement that f is a function from X to Y using the function notation f:X→Y.