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+ Y and A C X and B CY, for which types of functions (injective, surjective, or never) are the following (b) If f :X
+ Y and A C X and B CY, for which types of functions (injective, surjective, or never) are the following (b) If f :X true: f-1(F(A)) = A f(f=1(B)) = B Prove your arguments using definitions from set theory or provide counterexamples
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