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Let f: W ->Wbe defined as f(n) = n - 1,...

Let `f: W ->W`be defined as `f(n) = n - 1`, if `n` is odd and `f(n) = n + 1`, if `n` is even. Show that `f` is invertible. Find the inverse of `f`. Here, `W` is the set of all whole numbers.

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