G. {2.5/5.5 Points] DETAILS PREVIOUS ANSWERS SCALCET8 14.6.027. MY NOTES PRACTICE ANOTHER (a) Show that a differentiable function fdecreases most rapidly at x in the direction opposite the gradient vector, that is, in the direction of Vf(x). Let 9 be the angle between Vf(x) and unit vector u. Then Duf = |Vf| c039 t) J . Since the minimum value of cosH c J is C] J occurring, for 0 s 9