Find all second order derivatives for r(x,y) = [xx(x,y) = 'yy(x,y) = Txy(x,y) = ryx (x,y)...

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Find all second order derivatives for r(x,y) = [xx(x,y) = 'yy(x,y) = Txy(x,y) = ryx (x,y) = xy 8x+5y Find all second order derivatives for r(x,y) = [xx(x,y) = 'yy(x,y) = Txy(x,y) = ryx (x,y) = xy 8x+5y