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Let f be a one-one function with domain ...

Let f be a one-one function with domain `(21, 22, 23)` and range `{x,y,z).` It is given that exactly one of the following statements is true and the remaining two are false. `f(21) = x; f(22)!=x ; f(23) != y.` Then `f^(-1)(x)` is

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