Register    Login    Search    Rss Feeds

Forums Home » Ask An Instructor » GMAT Math » Official Guide Math


 Page 1 of 1 [ 3 posts ] 



  Print view Print view Previous topic Previous topic | Next topic Next topic
 

OG - PS - #40

Author Message
CC
 Post subject: OG - PS - #40
 Post Posted: Wed Sep 12, 2007 4:43 pm 
Which of the following cannot be a value of 1/x-1?

I don't get the explanation for this problem. The OG says "since 1 divided by any number can never equal zero".
if x=0 then the value would be 1/-1=-1.

Am I missing something?

thanks!
Top 
StaceyKoprince
 Post subject:
 Post Posted: Mon Sep 17, 2007 7:58 pm 
Offline
ManhattanGMAT Staff


Posts: 6077
Location: San Francisco
Please post the complete text of the problem, including answer choices. Please also make sure to use parentheses or other formatting when necessary - for instance, should this problem read 1/(x-1) or (1/x) - 1? Thanks!

_________________
Stacey Koprince
Instructor
Director of Online Community
ManhattanGMAT
Top 
StaceyKoprince
 Post subject:
 Post Posted: Mon Sep 17, 2007 8:01 pm 
Offline
ManhattanGMAT Staff


Posts: 6077
Location: San Francisco
Quote:
The OG says "since 1 divided by any number can never equal zero".
if x=0 then the value would be 1/-1=-1.


Please also clarify your question - the OG says the outcome of the division can't equal zero and the example you gave does not, in fact, equal zero. It equals -1. You set x=0, but the excerpt you quoted from OG does not say x can't equal zero.

_________________
Stacey Koprince
Instructor
Director of Online Community
ManhattanGMAT
Top 
Display posts from previous:  Sort by  
 
 Page 1 of 1 [ 3 posts ] 





Who is online

Users browsing this forum: No registered users and 0 guests

 
 

 
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to: