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Author Message
Intern
Joined: 09 Nov 2017
Posts: 19

### Show Tags

26 Dec 2017, 20:42
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

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Dear all

I have a question in inequality DS which is as follows

If √(xy) = xy, what is the value of x + y? (1) x = -1/2 (2) y is not equal to 0.

My approach is ((XY)^1/2 )^2= (XY )^2 and hence XY= (XY)^2 and hence XY =1 . Therefore it looks 1) X =-1/2 is sufficient to answer the question.

However this is not true . Without telling the answer, I request you to clarify whether the approach is right . If not, then what is the right approach?

--== Message from the GMAT Club Team ==--

THERE IS LIKELY A BETTER DISCUSSION OF THIS EXACT QUESTION.
This discussion does not meet community quality standards. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.
Math Expert
Joined: 02 Sep 2009
Posts: 52285

### Show Tags

26 Dec 2017, 20:48
rajangupta wrote:
Dear all

I have a question in inequality DS which is as follows

If √(xy) = xy, what is the value of x + y? (1) x = -1/2 (2) y is not equal to 0.

My approach is ((XY)^1/2 )^2= (XY )^2 and hence XY= (XY)^2 and hence XY =1 . Therefore it looks 1) X =-1/2 is sufficient to answer the question.

However this is not true . Without telling the answer, I request you to clarify whether the approach is right . If not, then what is the right approach?

--== Message from the GMAT Club Team ==--

THERE IS LIKELY A BETTER DISCUSSION OF THIS EXACT QUESTION.
This discussion does not meet community quality standards. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.

_________________
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