1. Sides a,b,c form a triangle.

2. Sides (a+x),(b+y),(c+z) also form a triangle.

3. x+y+z=0.

4. Assume without loss of generality that a>b>c, and x>0.

Thanks!

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## Comments

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TopNewestI don't think condition 4 is a "without loss of generality".

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Could you explain that? I don't really understand why not. Thanks.

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Say that \( a = 11, b = 10, c = 9 \) and \( x = -1, y = 0 , z = 1 \). How do you want to reorder the terms (IE WLOG) such that your condition 4 holds?

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However, "help with the proof" could be elaborated on better.

If we can showthat when \(a, b, c \) and \( x, y, ,z \) are similarly ordered, then the RHS decreases, then yes we could make the assumption that \( a> b> c \) and \( x > y > z \), which gives us \( x > 0 \).Log in to reply