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you are given that f(x) = x^3 + 2x - 6i) show that the equation f(x) = 0 has a root lying between x = 1 and x = 2ii) taking x = 1 as the first approximation to the root, use the Newton-Raphson method to find three further approximations to the rootiii) show that your final approximation is accurate to 2 decimal places

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