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

It is currently 26 May 2016, 18:49
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

Which of the following is a value of x for which x^11 - x^9

  post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Intern
Intern
avatar
Joined: 24 Nov 2012
Posts: 25
Followers: 0

Kudos [?]: 28 [0], given: 0

Which of the following is a value of x for which x^11 - x^9 [#permalink]

Show Tags

New post 29 Nov 2012, 10:22
1
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

86% (01:41) correct 14% (00:31) wrong based on 54 sessions

HideShow timer Statistics

Which of the following is a value of x for which x^11 - x^9 > 0 ?

A. -2
B. -1
C. -1/2
D. 1/2
E. 1

Last edited by Bunuel on 29 Nov 2012, 10:25, edited 1 time in total.
Edited the question.
Expert Post
Math Expert
User avatar
Joined: 02 Sep 2009
Posts: 33037
Followers: 5759

Kudos [?]: 70576 [0], given: 9849

Re: Which of the following is a value of x for which x^11 - x^9 [#permalink]

Show Tags

New post 29 Nov 2012, 10:30
Expert's post
1
This post was
BOOKMARKED
ritumaheshwari02 wrote:
Which of the following is a value of x for which x^11 - x^9 > 0 ?

A. -2
B. -1
C. -1/2
D. 1/2
E. 1


\(x^{11} - x^9 > 0\) --> \(x^9(x^2-1)>0\) --> \((x+1)x^9(x-1)>0\) --> roots are -1, 0 and 1 --> \(-1<x<0\) or \(x>1\). Only C fits.

Answer: C.

Solving inequalities:
x2-4x-94661.html#p731476
inequalities-trick-91482.html
everything-is-less-than-zero-108884.html
xy-plane-71492.html
_________________

New to the Math Forum?
Please read this: All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

Re: Which of the following is a value of x for which x^11 - x^9   [#permalink] 29 Nov 2012, 10:30
    Similar topics Author Replies Last post
Similar
Topics:
Experts publish their posts in the topic If (x-11)(x-3) < 0, which of the following must be true? Bunuel 2 13 Mar 2016, 09:50
If 4x - 12 > x + 9, which of the following must be true arhumsid 0 13 Oct 2015, 03:11
24 Experts publish their posts in the topic Which of the following is a value of x for which x^11-x^3>0 Baten80 17 27 Jan 2012, 12:58
18 Experts publish their posts in the topic If 4x-12 >= x + 9, which of the following must be true saxenagarima 24 26 Sep 2010, 10:48
5 Experts publish their posts in the topic For which of the following values of x is nifoui 4 21 Mar 2010, 11:00
Display posts from previous: Sort by

Which of the following is a value of x for which x^11 - x^9

  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®.