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100 points for $49 worth of Veritas practice GMATs FREE VERITAS PRACTICE GMAT EXAMS Earn 10 Points Per Post Earn 10 Points Per Thanks Earn 10 Points Per Upvote ## Pls help with Power-Prep algebra question ##### This topic has 3 member replies ## Pls help with Power-Prep algebra question Pls help with the attached Power-Prep algebra question OA is C Attachments This post contains an attachment. You must be logged in to download/view this file. Please login or register as a user. Last edited by erjamit on Sun Aug 03, 2008 5:50 am; edited 1 time in total Junior | Next Rank: 30 Posts Joined 28 Mar 2008 Posted: 12 messages Target GMAT Score: 700 is the answer II only? Master | Next Rank: 500 Posts Joined 22 Oct 2007 Posted: 170 messages Upvotes: 7 Test Date: 08/20 Target GMAT Score: 750+ yes OA Is C Junior | Next Rank: 30 Posts Joined 28 Mar 2008 Posted: 12 messages Target GMAT Score: 700 When in doubt- plug in numbers. The question says x and y are positive. I could have plugged in fractions but I used integers to make it easier on me. You should use a positive fraction after if you dont get an answer. I am not sure if this is the eight way to do it, but this is how I usually solve these kind of questions. I just plugged in x = 2 and y = 2 1/ (x + y)^ (1/2) = 1/2 so you need to plus in value for x and y and see which of the given choices are greater than 1/2 1) (4) ^ (1/2) / 4 = 1/2 is equal to the equation therefore not right 2) (2)^1/2 + (2)^(1/2) / 4 = 2 * 2^(1/2) / 4 = (1/2) * (2)^(1/2) , which is > 1/2 3) 0 / 4 = 0 not greater than 1/2 Note - x^(1/2) is same as x *sqrt 2 Hence C is your answer Let me know if you have questions. • Free Veritas GMAT Class Experience Lesson 1 Live Free Available with Beat the GMAT members only code • 1 Hour Free BEAT THE GMAT EXCLUSIVE Available with Beat the GMAT members only code • 5-Day Free Trial 5-day free, full-access trial TTP Quant Available with Beat the GMAT members only code • 5 Day FREE Trial Study Smarter, Not Harder Available with Beat the GMAT members only code • Get 300+ Practice Questions 25 Video lessons and 6 Webinars for FREE Available with Beat the GMAT members only code • Magoosh Study with Magoosh GMAT prep Available with Beat the GMAT members only code • Free Trial & Practice Exam BEAT THE GMAT EXCLUSIVE Available with Beat the GMAT members only code • FREE GMAT Exam Know how you'd score today for$0

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