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Homework Help: Inequalities Question

  1. Mar 18, 2013 #1
    DIhhNSN.png

    I need help with the second part, I've managed to get through all of the part (i), but I have no idea where to really start with part (ii), any hints to start me off and I'll keep posting how I'm doing.

    thanks
     
  2. jcsd
  3. Mar 18, 2013 #2

    tiny-tim

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    hi synkk! :smile:

    (i don't know whether this works :redface:, but …)

    i'd try rewriting it as a + b + c ≥ 3abc :wink:
     
  4. Mar 18, 2013 #3
    Hint: the last equality can be rewritten as:
    [tex]\frac{trs^2 + rst^2+ tsr^2}{rst}[/tex]
     
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