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Question 4 (8 points) Which of the following functions has an inverse? f: R - R, where f(x) = x - 4 f: R -

Question 4 (8 points) Which of the following functions has an inverse? f: R - R, where f(x) = x - 4 f: R - R, where f(x) = 3x2 - 2 O f: Z - Z, where f(n) = 2n + 1 Of: Z - Z, where f(n) = 8

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