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# R=1+2xy+x^2y^2, what is the value of xy 1) R=0 2) x>0 OA

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Intern
Joined: 25 Sep 2010
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R=1+2xy+x^2y^2, what is the value of xy 1) R=0 2) x>0 OA [#permalink]  14 Oct 2010, 19:56
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Question Stats:

50% (02:20) correct 50% (00:21) wrong based on 5 sessions
R=1+2xy+x^2y^2, what is the value of xy

1) R=0
2) x>0

OA : A
Retired Moderator
Status: The last round
Joined: 18 Jun 2009
Posts: 1318
Concentration: Strategy, General Management
GMAT 1: 680 Q48 V34
Followers: 56

Kudos [?]: 482 [0], given: 157

Re: DS question : need help [#permalink]  15 Oct 2010, 01:20
satishreddy wrote:
R=1+2xy+x^y^, what is the value of xy

1) R=0
2) x>0

OA : A

I think the question you posted is incomplete.

what does y^ mean?? There will be some digit aftger y^.
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Math Expert
Joined: 02 Sep 2009
Posts: 23538
Followers: 3482

Kudos [?]: 26116 [0], given: 2705

Re: DS question : need help [#permalink]  15 Oct 2010, 02:30
Expert's post
satishreddy wrote:
R=1+2xy+x^2*y^2, what is the value of xy

1) R=0
2) x>0

OA : A

Question should be:

R=1+2xy+x^2*y^2, what is the value of xy?

(1) R=0 --> 1+2xy+x^2*y^2=0 --> (xy+1)^2=0 --> xy=-1. Sufficient.
(2) x>0 --> Clearly insufficient.

 ! Please post PS questions in the PS subforum: gmat-problem-solving-ps-140/Please post DS questions in the DS subforum: gmat-data-sufficiency-ds-141/

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Joined: 19 Apr 2010
Posts: 216
Schools: ISB, HEC, Said
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Kudos [?]: 18 [0], given: 28

Re: DS question : need help [#permalink]  17 Oct 2010, 23:39
Certainly a tricky one. Thanks for posting
Re: DS question : need help   [#permalink] 17 Oct 2010, 23:39
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