Question: b) Consider a function, f : Z - Z where f(x) = 3x + 3 (a) Prove or disprove whether f is injective (b) Prove

b) Consider a function, f : Z - Z where f(x) = 3x
b) Consider a function, f : Z - Z where f(x) = 3x + 3 (a) Prove or disprove whether f is injective (b) Prove or disprove whether f is surjective

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