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For Any Function F: a → B , Define a New

Question 18

Essay

For any function f: A → B , define a new function g: P(A) → P(B) as follows: for every S ⊆ A, g(S) = { f(x) |
x ∈ S Prove that f is onto if and only if g is onto.

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Suppose 11ec7c17_dcd7_e167_bf14_8f9eb943...

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