Last visit was: 14 Dec 2024, 09:47 It is currently 14 Dec 2024, 09:47
Home
GMAT
Messages
Tests
Schools
Reviews
Social
Chat
My Profile
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.
Go to My Error Log Learn more
Close
Request Expert Reply
Confirm Cancel
User avatar
brstorewala
User avatar
Joined: 28 Feb 2003
Last visit: 02 May 2004
Posts: 50
Own Kudos:
33
Posts: 50
Kudos: 33
What is the value of x? 1) (-x)^3 = -x^3 2) 22 May 2003, 23:48
Kudos
Add Kudos
Bookmarks
Bookmark this Post
00:00
Start Timer
Pause Timer
Resume Timer
Show Answer
Hide
Show
History
N
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!

Difficulty:

(N/A)

Question Stats:

75% (00:49) correct 25% (01:32) wrong based on 6 sessions

History

Date
Time
Result
Not Attempted Yet
What is the value of x?

1) \((-x)^3 = -x^3\)
2) \((-x)^2 = -x^2\)

open to debate.....

--== Message from the GMAT Club Team ==--

THERE IS LIKELY A BETTER DISCUSSION OF THIS EXACT QUESTION.
This discussion does not meet community quality standards. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.
avatar
stolyar
avatar
Joined: 03 Feb 2003
Last visit: 06 May 2014
Posts: 1,012
Own Kudos:
1,753
Posts: 1,012
Kudos: 1,753
What is the value of x? 1) (-x)^3 = -x^3 2) 23 May 2003, 00:33
Kudos
Add Kudos
Bookmarks
Bookmark this Post
what does (...) mean? Simple parentheses?
User avatar
brstorewala
User avatar
Joined: 28 Feb 2003
Last visit: 02 May 2004
Posts: 50
Own Kudos:
33
Posts: 50
Kudos: 33
What is the value of x? 1) (-x)^3 = -x^3 2) 23 May 2003, 00:53
Kudos
Add Kudos
Bookmarks
Bookmark this Post
stolyar
Aha... I see a trick. B?



perfect :!: :!: :!:

:cool :musband :wave :drinking :snipersmile: :woohoo
avatar
ju_1
avatar
Joined: 07 May 2003
Last visit: 07 Jul 2003
Posts: 4
Own Kudos:
98
Location: Dallas
Posts: 4
Kudos: 98
What is the value of x? 1) (-x)^3 = -x^3 2) 23 May 2003, 09:25
Kudos
Add Kudos
Bookmarks
Bookmark this Post
plz explain how it is B.........
User avatar
brstorewala
User avatar
Joined: 28 Feb 2003
Last visit: 02 May 2004
Posts: 50
Own Kudos:
33
Posts: 50
Kudos: 33
What is the value of x? 1) (-x)^3 = -x^3 2) 23 May 2003, 18:10
Kudos
Add Kudos
Bookmarks
Bookmark this Post
from statement 1,

if x = 0 both sides are equal
if x = 1 both sides are again equal {(-1)^3 = -1 & -1^3 = 1}

therefore x =0 or x = 1

from statement 2

x can only be zero because the square of a number other than zero cannot be negative. {(-1)^2 = 1 which is not equal to -(1)^2)}

therefore statement 2 is sufficient to say that x = 0

hope that helps
User avatar
bb
User avatar
Founder
Joined: 04 Dec 2002
Last visit: 13 Dec 2024
Posts: 39,369
Own Kudos:
76,728
Given Kudos: 21,581
Location: United States (WA)
GMAT 1: 750 Q49 V42
GPA: 3
Products:
GMAT Club Tests Forum Quiz
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
GMAT 1: 750 Q49 V42
Posts: 39,369
Kudos: 76,728
What is the value of x? 1) (-x)^3 = -x^3 2) 23 May 2003, 18:14
Kudos
Add Kudos
Bookmarks
Bookmark this Post
brstorewala
from statement 1,

if x = 0 both sides are equal
if x = 1 both sides are again equal {(-1)^3 = -1 & -1^3 = 1}

therefore x =0 or x = 1

from statement 2

x can only be zero because the square of a number other than zero cannot be negative. {(-1)^2 = 1 which is not equal to -(1)^2)}

therefore statement 2 is sufficient to say that x = 0

hope that helps



I agree about -(1)^2, but where did you get it?
we have only -x^2 and (-x)^2; is it the -x^2 ?

-=
User avatar
brstorewala
User avatar
Joined: 28 Feb 2003
Last visit: 02 May 2004
Posts: 50
Own Kudos:
33
Posts: 50
Kudos: 33
What is the value of x? 1) (-x)^3 = -x^3 2) 23 May 2003, 18:28
Kudos
Add Kudos
Bookmarks
Bookmark this Post
yes it is -x^2

negative sign is not included in the power.
Moderators:
Bunuel
Math Expert
97874 posts
yashikaaggarwal
Senior Moderator - Masters Forum
3116 posts
GMATBusters
GMAT Tutor
1930 posts