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3. The limit definition of the dervative states that: mtan = lim flath) - f(a) 1 -+0 h is the slope of the tangent to y = f(x) at (a, f(a)) (a) Write out the formula for mtan applied to f(x) = vx + 8 and a = 1. (b) Compute the slope mtan of the tangent line at a = 1. (c) Write the equation y = mx + b of the tangent line to y = vx + 8 at (1, 3)