Number Theory- GMATPrep

This topic has expert replies
Senior | Next Rank: 100 Posts
Posts: 47
Joined: Tue Sep 20, 2011 2:34 pm
Thanked: 1 times
Followed by:1 members

Number Theory- GMATPrep

by anks17 » Fri Aug 10, 2012 10:07 pm
Experts,

Please help to understand how we can arrive at answer. Did try with different numbers but couldn't get it.
Attachments
Number Theory- GMATPrep.png
"doesn't matter ver u r...ur destiny depends upon vho u choose 2 b!!!!"

Master | Next Rank: 500 Posts
Posts: 363
Joined: Sun Oct 17, 2010 3:24 pm
Thanked: 115 times
Followed by:3 members

by theCEO » Sat Aug 11, 2012 1:52 pm
the answer could be reached by trying two values for x: 0.99 and 1.01.


x--------1/x------2x-------x2
0.99----1.01----1.98----0.9801


x--------1/x------2x-------x2
1.01----0.99----2.02----1.02