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1. (a). Find the linear approximation to f(x) = Vx at x = 81, (b). use it to approximate v85. (c). Compute the percent error in your approximation, 100|Approximation - exact|/lexact), where the exact value is given by a calculator. 2. (a). Use linear approximation to estimate In 1.03. (b). Compute the percent error in your approximation, 100| Approximation - exact|/|exact|