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Undergrad How Can Injectivity Prove f^(-1)(f(A)) = A?
who can help me? ı want to prove this If f : X → Y is injective and A is a subset of X, then f −1(f(A)) = A. but how can I do this :(- m_kosak
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- Function Injective
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- Forum: Set Theory, Logic, Probability, Statistics