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davisasialene
- Newbie | Next Rank: 10 Posts
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- Joined: Thu Mar 06, 2008 9:41 pm
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For some reason, this question isn't clicking for me. It must be super easy, but I'm just not seeing my error.
Is x^4 + y^4 > z^4?
(1) x^2 + y^2 > z^2
(2) x + y > z
I understand that (2) is insufficient because x and y could be negative numbers, but why isn't (1) sufficient?
Is x^4 + y^4 > z^4?
(1) x^2 + y^2 > z^2
(2) x + y > z
I understand that (2) is insufficient because x and y could be negative numbers, but why isn't (1) sufficient?
