Question: Determine whether these functions are injective, surjective, bijective, neither, or not a function when they map Z to Z+. (a) f (x) = 3x +

Determine whether these functions are injective, surjective, bijective, neither, or not a function when they map Z to Z+. (a) f (x) = 3x + 1 when x 0 (b) f (x) = 2x + 1 when x 0 (c) f (x) = x2 + 1 (d) f (x) = 3x 1 when x 0 (e) f (x) = 3x + 2 when x < 0 (f) f (x) = |x|+ 1 (g) f (x) = 2x 1 when x 0 (h) f (x) = 3x + 2 when x < 0 (i) f (x) = 2x when x < 0 (j) f (x) = 2x when x < 0

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