Given a point x and function f, consider the problem of finding the a direction d with unit norm that results in the fastest decrease of f(x + d), given by min af (2) di axi n s.t ? = 1. i=1 Show that d= f(x) is a KKT point for the above optimization problem. Given a point x and function f, consider the problem of finding the a direction d with unit norm that results in the fastest decrease of f(x + d), given by min af (2) di axi n s.t ? = 1. i=1 Show that d= f(x) is a KKT point for the above optimization