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Please solve all but 10 and 11 7. f: Z-Z is defined by the rule fx) x This means Given an input x e Z,

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7. f: Z-Z is defined by the rule fx) x This means "Given an input x e Z, the value of f at x is x2 Z a. Is every element of the codomain an output of one and only input into this function? b. Is this example a function? Why or why not

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