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Just prove it (Posted on 2013-10-20) Difficulty: 2 of 5
Prove that:
If (x+sqrt{1+y^2})*(y+sqrt{1+x^2})=1,
then
x+y=0 .

No Solution Yet Submitted by Ady TZIDON    
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  Subject Author Date
SolutionHyperbolic ApproachHarry2013-10-28 08:48:51
Hints/TipsSmall hint , no spoilerAdy TZIDON2013-10-24 17:26:40
Some ThoughtsMusing on possible lines of attackJer2013-10-23 08:55:08
Doing it backwardsSteve Herman2013-10-21 09:19:44
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