Find all School-related info fast with the new School-Specific MBA Forum
Learn more about the recent changes... close

It is currently 25 May 2013, 10:31
Customize  |  Hide

Search
Register
New posts
Unanswered

some maths doubts...

  Question banks Downloads My Bookmarks Reviews  
  Oldest Best Reply
Search for:
 
Print view
First unread post
Author Message
TAGS:
Manager
Manager
Joined: 03 Jul 2006
Posts: 179
Followers: 1

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

GMAT Tests User
some maths doubts... [#permalink] New post 10 Jul 2006, 08:45
Can someone please explain these ?

1) x^2 > 2

how can we get the following solution ?
x < -sqrt(2) < -1 or x > sqrt(2) > 1

2) x^2 > x

how to derive the solution for x ?

3) What does the following mean for a triangle

AC^2+AB^2>BC^2

Thanks in advance for your help
SVP
SVP
User avatar
Joined: 05 Apr 2005
Posts: 1745
Followers: 2

Kudos [?]: 17 [0], given: 0

GMAT Tests User
Re: some maths doubts... [#permalink] New post 10 Jul 2006, 10:34
rkatl wrote:
1) x^2 > 2
how can we get the following solution ?
x < - sqrt(2) < -1 or x > sqrt(2) > 1


x^2 > 2
take the sqrt
x > sqrt(2) or x < - sqrt(2). and - sqrt(2) is less than -1.
take any value. lets say x^2 = 25. x can either be 5 or smaller than -5.
x (5) > sqrt (2).
x (-5) < - sqrt (2).



rkatl wrote:
2) x^2 > x
how to derive the solution for x ?


x^2 > x
x^2 - x > 0
x (x- 1) > 0
here it ios correct to say x > 1 but not x>0. actually x>1 but is <0.

for more information anddiscussions refer here: http://www.gmatclub.com/phpbb/viewtopic.php?t=14576


rkatl wrote:
3) What does the following mean for a triangle
AC^2 + AB^2 > BC^2


this means the triangle is not a right triangle.
Re: some maths doubts...   [#permalink] 10 Jul 2006, 10:34
    Similar topics Author Replies Last post
Similar
Topics:
 New posts EXPERTS_POSTS_IN_THIS_TOPIC Some doubts about GMAT score russianflame 3 23 Dec 2004, 10:27
New posts still some doubts in s.c(help!!!) ankitraheja 3 07 Sep 2005, 20:53
New posts Some doubt on Inequalities tkarthi4u 1 18 Feb 2009, 23:49
New posts maths 08 question #4 doubt ggmatt 1 28 Oct 2009, 10:06
New posts 1 Some shortcuts of math sujit2k7 3 17 Aug 2012, 18:45
Display posts from previous: Sort by

some maths doubts...

  Question banks Downloads My Bookmarks Reviews  
Print view
First unread post

Moderators: Bunuel, VeritasPrepKarishma

Search for:


GMAT Club MBA Forum Home| About| Privacy Policy| 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®.

Main navigation

GMAT Resources

Partners

MBA Resources

www.gmac.com|www.mba.com