Z is the set of integers, R is the set of real numbers. 4) Find the inverse of functions a) f: [0,∞) -> [0,∞), f(x) = x2 + 12; b) f: R - {-5/2} -> R - {3/2}, f(x) = 3x/(2x + 5); c) f: R+ -> (0,1), f(x) = 1/(x + 1);

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