110-4

{10%) 4. Let 901:, y, 2.) be a function defined on R3 with continuous partial derivatives. Suppose that |Vg(2, 1, 3)|2 = 36 and 92(2, 1,3) > 0 . Moreover. the trajectories of the two curves Fi) = (2s, 232 3, 1 + 23) and r305) = (23200\