BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Ds

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
User avatar
Master | Next Rank: 500 Posts
Posts: 248
Joined: Mon Aug 11, 2008 9:51 am
Thanked: 13 times

Ds

by earth@work » Tue Dec 02, 2008 3:02 pm
Does x^2 = sq root (xy) ?
(1)y/x^3 = 1
(2) x^2 + y^2 =(x − y)^2

(1) was easy but could not understand (2) here.

Ans: A
Top
Source: — Data Sufficiency |
Legendary Member
Posts: 2467
Joined: Thu Aug 28, 2008 6:14 pm
Thanked: 331 times
Followed by:11 members

by cramya » Tue Dec 02, 2008 5:00 pm
I am sure u got stmt I's sufficiency

Not sure if I am missing something here; hope not.

Stmt II

x^2+y^2 = (x-y)^2

x^2+y^2 = x^2+y^2-2xy

2xy=0
xy=0
sqrt(xy) = 0

Either x is 0 then x^3 could equal sqrt(xy)
or y is 0 and x is not 0 then x^3 is not equal to sqrt(xy)

INSUFF

A)
Top
User avatar
Master | Next Rank: 500 Posts
Posts: 248
Joined: Mon Aug 11, 2008 9:51 am
Thanked: 13 times

by earth@work » Tue Dec 02, 2008 5:08 pm
thanks cramya. the explanation in the book had complicated the (2) statement..got it now!
Top
Post new topic Post Reply
• Page 1 of 1