Consider the function f(x) = cos x − 3x + 1. Since f (0)f() <0. f(x) has a root in [0]. If we use secant method, with x₁ = 0.5 and x₁ = = 0.6, to estimate the root of f(x) = cos x - 3x + 1, what is x3? (Answer must be in 8 decimal places)

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