Find the forward and backward error for the following functions, where the root is 3/4 and the approximate root is xa = 0.74: (a) f(x) = 4x - 3 (b) f(x) = (4x - 3)² (c) f(x) = (4x - 3)³ (d) f(x) = (4x - 3)¹/3

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