When the centered difference approach of f(x) = sinx-2³ +1 is used to estimate the first derivative of the function at x=1.4, what would be the true relative error if step size is 0.15. Round-off answers to 4 decimal places. O 0.4052% O 0.2814% O 0.3530% O 0.5515% O none of the choices

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