some time ago i gave the best approach to solving this problem, and more problems of this kind, in this thread: http://www.mathhelpforum.com/math-he...-fun-36-a.html
if you still couldn't complete the proof, let us know.
some time ago i gave the best approach to solving this problem, and more problems of this kind, in this thread: http://www.mathhelpforum.com/math-he...-fun-36-a.html
if you still couldn't complete the proof, let us know.