Let `f : N-N`be defined by `f(n)={(n+1)/2,'if n is odd ' n/2,'if n is even '` for all `n in N`

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Let `f : N-N`be defined by `f(n)={(n+1)/2,"if n is odd " n/2,"if n is even "` for all `n in N`. State whether the function f is bijective. Justify your answer.
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