Question: Clear please Give an explicit formula for a function from the set of positive integers the set of non-negative integers that is one-to-one, but not

Clear please Clear please Give an explicit formula for a function from the

Give an explicit formula for a function from the set of positive integers the set of non-negative integers that is one-to-one, but not onto: onto, but not one-to-one: neither onto nor one-to-one: both one-to-one and onto. both one-to-one and onto

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