Find all School-related info fast with the new School-Specific MBA Forum

It is currently 25 May 2016, 18:07
GMAT Club Tests

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Stumped on this one ..

  post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Manager
Manager
User avatar
Joined: 29 Nov 2006
Posts: 56
Followers: 1

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

Stumped on this one .. [#permalink]

Show Tags

New post 23 Jun 2007, 14:38
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Stumped on this one ...
Attachments

divider.JPG
divider.JPG [ 17.2 KiB | Viewed 447 times ]

Senior Manager
Senior Manager
User avatar
Joined: 28 Feb 2007
Posts: 306
Followers: 1

Kudos [?]: 37 [0], given: 0

 [#permalink]

Show Tags

New post 25 Jun 2007, 12:15
1/(Sqrt (X+Y))=Sqrt(X+Y)/(X+Y)

[Sqrt(X)+Sqrt(Y)]/(X+Y) >= Sqrt(X+Y)/(X+Y)

First as the denominator is same u can drop.
Everything depends on the Numerator.to check just take square of both sides (numerator is enough):

X+Y+2*Sqrt(x*y)>= X+Y
then 2*Sqrt(x*y)>=0 because X, Y are Positive.
Senior Manager
Senior Manager
avatar
Joined: 27 Jul 2006
Posts: 298
Followers: 1

Kudos [?]: 10 [0], given: 0

 [#permalink]

Show Tags

New post 25 Jun 2007, 21:26
I am going with 1 and 2 only.

3 is actually equal, and so cannot be greater.
Senior Manager
Senior Manager
User avatar
Joined: 04 Mar 2007
Posts: 440
Followers: 2

Kudos [?]: 31 [0], given: 0

 [#permalink]

Show Tags

New post 26 Jun 2007, 00:48
Ref (I)
let x=1 and y = 1
1/sqrt(2)=sqrt(2)/2
Hence it's not (I)
  [#permalink] 26 Jun 2007, 00:48
Display posts from previous: Sort by

Stumped on this one ..

  post reply Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.