Vector calc proof arggg

  • Thread starter weihead
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  • #1
weihead
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Homework Statement



http://photos-f.ak.fbcdn.net/hphotos-ak-ash1/hs425.ash1/23519_677242553394_6313872_37501934_8229842_n.jpg [Broken]

I'm unsure as to how to approach part b and c... I figured out part A but I don't know how it ties in to part b. Is it saying that F is a function of little f composed r(x) at x^?


Intuitively I should sub in part a in to part b but i'm not sure.
Also, for part c..when it says n=3, does it mean that it is the sum of all the functions of x from 1 to 3? so the function I'm computing the Hessian for would be 1/3x^2?
 
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Answers and Replies

  • #2
Dick
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For b I think you are supposed to realize that grad(g(r))=g'(r)*grad(r). I'm not really sure where they are going with c.
 

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