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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 If x is positive and y is 1 more than the square of x, then This topic has 1 expert reply and 1 member reply Top Member If x is positive and y is 1 more than the square of x, then Timer 00:00 Your Answer A B C D E Global Stats Difficult If x is positive and y is 1 more than the square of x, then what is the value of x in terms of y? $$A.\ y^2\ -\ 1$$ $$B.\ y^2\ +\ 1$$ $$C.\ \sqrt{y}-\ 1$$ $$D.\ \sqrt{y\ -\ 1}$$ $$E.\ \sqrt{y\ +\ 1}$$ OA D Source: Princeton Review GMAT/MBA Expert GMAT Instructor Joined 25 Apr 2015 Posted: 2791 messages Followed by: 18 members Upvotes: 43 BTGmoderatorDC wrote: If x is positive and y is 1 more than the square of x, then what is the value of x in terms of y? $$A.\ y^2\ -\ 1$$ $$B.\ y^2\ +\ 1$$ $$C.\ \sqrt{y}-\ 1$$ $$D.\ \sqrt{y\ -\ 1}$$ $$E.\ \sqrt{y\ +\ 1}$$ We can create the equation: y = 1 + x^2 y - 1 = x^2 √(y - 1) = x Answer: D Newbie | Next Rank: 10 Posts Joined 17 Aug 2018 Posted: 9 messages Hi, It’s a straight forward question. Given, x is positive and y = x^2 + 1 y = x^2 +1 x^2 = y-1 x = sqrt(y-1) So the answer is D. OR We can try numbers too. If x = 1 then y = 2. When we substitute y = 2 in the answer choices we should get “x” value as 1. A. y^2 - 1 = 4 - 1 = 3. Eliminate. B. y^2 + 1 = 4 + 1 = 5. Eliminate. C. √(y)- 1 = √2 - 1 = not an integer. Eliminate. D. √(y - 1) = √(2 - 1) = 1. Hold on. E. √(y + 1) = √(2 + 1) = 3. Eliminate. So the answer is D. • Award-winning private GMAT tutoring Register now and save up to$200

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