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Find all the first and second order partial derivatives of f(x, y) = -2 sin(2x + y) -7cos(x -y). 31 = fx = A. HI

Find all the first and second order partial derivatives of f(x, y) = -2 sin(2x + y) -7cos(x -y). 31 = fx = A. HI of B. By = fy = C. D. = fury = 83 f Ardy = fux = F. dur = foy =

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