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Let f:WvecW , be defined as f(x)=x1 , if...

Let `f:WvecW` , be defined as `f(x)=x1` , if `x` is odd and `f(x)=x+1` , if `x` is even. Show that `f` is invertible. Find the inverse of `f` , where `W` is the set of all whole numbers.

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