Find all the first and second order partial derivatives of f(x, y) = 6 sin(2x + y) — 2 cos(x − y). A. df = fx af B. f = fy= ду C. D. E. F. 8² f 8² f მყო a²f dx dy a²f მყმ = = = = - fxx fyy = - fyx fay -

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