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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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R=1+2xy+x^2y^2, what is the value of xy 1) R=0 2) x>0 OA [#permalink] New post 14 Oct 2010, 19:56
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R=1+2xy+x^2y^2, what is the value of xy

1) R=0
2) x>0

OA : A
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Re: DS question : need help [#permalink] New post 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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Re: DS question : need help [#permalink] New post 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.

Answer: A.


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Re: DS question : need help [#permalink] New post 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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