Explain why the function is differentiable at the given point. f(x, y) = 10 + e Xcos y, (7, 0) The partial derivatives are f,(x, y) = and f,(x, y) = , so fT, 0) = and f(n, 0) = Both f, and f, are continuous functions, so fis differentiable at (r, 0). Find the linearization L(x, y) of f(x, y) at (7, 0). L(x, y) =

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