Inequalities (V)

Expert replies

Previous Topic Next Topic

skim333: Newbie | Next Rank: 10 Posts; Posts: 8; Joined: Sat Mar 28, 2009 11:08 pm

by skim333 » Sat Jun 06, 2009 6:55 am

If x is not equal to 0, is x^2 + 1 / x > y?

(I) x = y

(2) y > 0

OA is C

Like this post

Source: Beat The GMAT — Data Sufficiency | Sat Jun 06, 2009 6:55 am

mehravikas: Legendary Member; Posts: 1161; Joined: Mon May 12, 2008 2:52 amFollowed by: 1 member; Location: Sydney; Thanked: 23 times

by mehravikas » Sat Jun 06, 2009 8:32 pm

We don't know whether x and y and positive or negative.

take y = -1 and 1

statement 1 - is insufficient because

(-1)^2 - 1/1 > 1 - false
(1)^2 + 1/1 > 1 - true

statement 2 is insufficient because it gives no info about x

combine the statement and you can use only positive hence answer 'C'

Like this post

nervesofsteel: Legendary Member; Posts: 594; Joined: Thu Aug 14, 2008 11:51 pm; Thanked: 12 times

by nervesofsteel » Sat Jun 06, 2009 11:55 pm

mehravikas wrote:We don't know whether x and y and positive or negative.

take y = -1 and 1

statement 1 - is insufficient because

(-1)^2 - 1/1 > 1 - false
(1)^2 + 1/1 > 1 - true

statement 2 is insufficient because it gives no info about x

combine the statement and you can use only positive hence answer 'C'

Hi Vikas ,

If we are taking y = -1 in A then shouldn't it be

(-1)^2 - 1/1 > -1 ..?? which is true..

Please explain...

Like this post

mehravikas: Legendary Member; Posts: 1161; Joined: Mon May 12, 2008 2:52 amFollowed by: 1 member; Location: Sydney; Thanked: 23 times

by mehravikas » Sun Jun 07, 2009 4:58 pm

Sorry it was my mistake, pick fractional values for y. i.e. -1/3, 1/3

you should get the answer.

nervesofsteel wrote:
mehravikas wrote:We don't know whether x and y and positive or negative.

take y = -1 and 1

statement 1 - is insufficient because

(-1)^2 - 1/1 > 1 - false
(1)^2 + 1/1 > 1 - true

statement 2 is insufficient because it gives no info about x

combine the statement and you can use only positive hence answer 'C'
Hi Vikas ,

If we are taking y = -1 in A then shouldn't it be

(-1)^2 - 1/1 > -1 ..?? which is true..

Please explain...

Like this post

Post new topic Post Reply

• Page 1 of 1

GMAT Course Reviews

560 reviews

1168 reviews

431 reviews

359 reviews

147 reviews

5/5

5 Star (560 Reviews)

"Target Test Prep is the closest to the official version of the GMAT exam, about 99% accuracy in terms of the quality and quantity of information. The course has excellently created singular sets of focused lessons and tests for every possible topic that one could come across in the official GMAT exam."

"The TTP course maximizes the efficiency of the time you spend studying. It will take time and effort but I could almost guarantee that if you complete the course exactly as it is laid out you will get an amazing score. They also have a very responsive team willing to help with any questions you might have."

"TTP has two things that I think no other test prep company offers: A teaching approach that reinforces understanding and an attitude that will give you the mental preparedness needed to succeed on the test. TTP gives you a deep understanding of the concept you need to know while teaching you how to think."

Write a Review