Use linear approximation, i.e. the tangent line, to approximate √81.3 as follows: - Let f(x) √x. Find the equation of the tangent line to f(x) at x = 81 L(x) = Using this, we find our approximation for √81.3 is NOTE: For this part, give your answer to at least 9 significant figures or use an expression to give the exact answer.

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