Find all the first and second order partial derivatives of f(x, y) = −4 sin(2x + y) + 10 cos(x - y). af A. = əx af B. = dy C. D. E. F. a²f Əx² a²f Əy² 8² f Ərdy 8²f əyəx fz fy = = = = = faz fyy = = fyr fry = =

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