ven by the vector equations r(s, )u,ss,Acmu the a printe) identily the surface gives A plane B elliptic paraboloid C ylinder D ellipsoid E None of the above a differentiable function of r and y with continuous second order partial derivatives. Let Mi + Nj be a gradient field and let Cbe the (positively oriented) ellipse ns shown in the sketch 17. (4 points) Let f be F-â½js below. Consider the following statements. (a) F is a conservative vector field. (o) (curl F) k> A. All three statements are true. B. Only (a) and (b) are true. C. Only (a) and (e) are true. D. Only (b) and (c) are true. E. None of the above ) = V arctan It C is the unit circle parameterized by r A. t) = costi + sin tj. 0
