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# Is x^4 + y^4 > z^4? 1. x^2 + y^2 > z^2 2. x + y > z

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Is x^4 + y^4 > z^4? 1. x^2 + y^2 > z^2 2. x + y > z [#permalink]  25 Nov 2006, 18:44
Is x^4 + y^4 > z^4?

1. x^2 + y^2 > z^2
2. x + y > z
Senior Manager
Joined: 23 Jun 2006
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x=y=3 z=4 is a counter example for both st1 and st2.
Senior Manager
Joined: 20 Feb 2006
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Can anyone provide the link to the previous posting? Good question.
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