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Section 6, question 25 1000 DS

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Source: — Data Sufficiency |
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Re: Section 6, question 25 1000 DS

by axefx » Wed Jan 24, 2007 11:10 am
isisalaska wrote:Source: 1000 DS, section 6
25. If x ≠ 1, is y equal to x + 1?
(1)
(2) y2 = (x + 1)2

Why is not D?
Your post is missing the first condition... please repost.
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by pankajks2010 » Sat May 14, 2011 12:13 pm
evaluating just the second statement: Its insufficient, as (-3)^2=3^2 ; However, -3 is not equal to 3. similarly, every negative & positive pair of a number would satisfy this.
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by cans » Fri May 27, 2011 8:01 am
y2 = (x + 1)2
=> y=+(x+1) or y=-(x+1)
Hence insufficient
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