Jacobian matrices and the Jacobian Calculate the Jacobian matrix of f ( x, y) = (2 + 2y, (y+1)2) at the point (x, y) = (3,3). Hence calculate the value of the Jacobian at this point. a b DF(3, 3) = C d where a = , b = C= , d = and det(DF(3, 3)) = _