Question: Let f: S-T be a function where S, T sets. Let UST be given. Prove that f^-1(U^c)=(f^-1(U))^c.

Let f: S-T be a function where S, T sets. Let UST 

Let f: S-T be a function where S, T sets. Let UST be given. Prove that f^-1(U^c)=(f^-1(U))^c.

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