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# DS4-25

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SVP
Joined: 16 Oct 2003
Posts: 1813
Followers: 4

Kudos [?]: 56 [0], given: 0

DS4-25 [#permalink]  11 Jun 2004, 18:38
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
ans with exp
Attachments

d25.JPG [ 8.45 KiB | Viewed 640 times ]

GMAT Club Legend
Joined: 15 Dec 2003
Posts: 4309
Followers: 29

Kudos [?]: 236 [0], given: 0

[#permalink]  11 Jun 2004, 18:54
B it is
from 1) could be 0 or 1
From 2) only 0 fits the bill
_________________

Best Regards,

Paul

Manager
Joined: 07 May 2004
Posts: 183
Location: Ukraine, Russia(part-time)
Followers: 2

Kudos [?]: 9 [0], given: 0

Re: DS4-25 [#permalink]  12 Jun 2004, 00:58
Bhai wrote:
ans with exp

2 alone is sufficient:

x^2 = -x^2 => x^2 = 0 => x = 0.
SVP
Joined: 30 Oct 2003
Posts: 1794
Location: NewJersey USA
Followers: 5

Kudos [?]: 43 [0], given: 0

[#permalink]  12 Jun 2004, 06:22
A) x(x-1)(x+1) = 0 x = { 0,1,-1} not sufficient
B) only x = 0 satisfies this equation (Sufficient)
[#permalink] 12 Jun 2004, 06:22
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# DS4-25

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