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GMATPrep2: If x != -y, is (x-y)/(x+y) > 1

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by msvmuthu » Thu Oct 16, 2008 7:21 am
Thanks a lot for a very detailed explanation. Thats an eye-opener.
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by navalpike » Mon May 25, 2009 7:37 pm
msvmuthu- I replied to your question here (another thread about the same question)

www.beatthegmat.com/gmatprep2-if-x-y-is ... 20022.html
Hi,

Can anyone point me to the correct link referred to above by Ian. As it is, the link brings me right back to this page.

Thanks,
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by navalpike » Mon May 25, 2009 7:40 pm
Never mind, found it. I think this is the right link.

https://www.beatthegmat.com/inequalities-t20825.html
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by Ian Stewart » Mon May 25, 2009 8:05 pm
navalpike wrote:Never mind, found it. I think this is the right link.

https://www.beatthegmat.com/inequalities-t20825.html
Not sure how that happened - sorry about that! Thanks for finding the correct link - I'll edit my post to avoid any further confusion.
For online GMAT math tutoring, or to buy my higher-level Quant books and problem sets, contact me at ianstewartgmat at gmail.com

ianstewartgmat.com
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by SanjeevK » Sat May 30, 2009 3:08 pm
The question asks if (x-y)/(x+y) > 1 or (x-y)/(x+y) -1 > 0
Simplifying:
[(x-y-x-y)/(x+y)] > 0
-2y/(x+y) > 0.

Hence the question is whether [-2y/(x+y)] > 0

Statement 1: x>0. y can be +ve or -ve. Insufficient
Statement 2: y<0. x can be +ve and less than y or x can be +ve and greater than y. Insufficient

Both 1 and 2 doesn't provide enough information.

IMO E
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