3. Use the formula ((x+h)-f(x) to approximate the derivative of f(x) = 3x² at x = 1 h using h = 0.1. Compute both the absolute true error and absolute relative true error.

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A: As per Bartleby guidelines we're supported to answer only first three subparts. Kindly repost rest.

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A: This is a problem of Numerical Analysis.

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A: By Bartleby policy I have to solve only first one as these are all unrelated &amp; lengthy problems....