Let f: XY and g: Y→ V be functions. Show the following: (a) f is injective 3h: Y→X such that ho f = idx (b) f is surjective 3h : Y→ X such that fo h= idy Use: v injective if x1 ‡xn → v(x1) = v(xn) How to prove these <-> How to proof with the arrows <-> (do you prove both rhs and lhs)

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Q: Let f: X→ Y and g: Y→ V be functions. Show the following: 3h : Y→X such that ho f = idx (a) f is…

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