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- Find the linearization of ƒ(x) = √(1 + x) + sin x - 0.5 at x = 0.The linearization of ex at x = 0 Derive the linear approximation ex = 1 + x at x = 0.If (x, y) moves from (x0, y0) to a point (x0 + dx, y0 + dy) nearby, how can you estimate the resulting change in the value of a dif-ferentiable function ƒ(x, y)? Give an example.