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IS ((x-3)^2)^1/2 = 3-x ?

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jitenderjain065
 Post subject: IS ((x-3)^2)^1/2 = 3-x ?
 Post Posted: Mon Jul 20, 2009 5:34 am 
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Students


Posts: 17
IS ((x-3)^2)^1/2 = 3-x ?
A) x =!(not equal) 3
B) -x|x| > 0
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margarit.ivanov
 Post subject: Re: IS ((x-3)^2)^1/2 = 3-x ?
 Post Posted: Mon Jul 20, 2009 10:55 am 
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Students


Posts: 1
((x-3)^2)^1/2=abs(x-3) so the question becomes is abs(x-3)=3-x, this is true if x-3<0 or x<3

A: quotes that x is not 3. this does not help you at all
B: quotes that -x*abs(x)>0. sice abs(x)>0 it follows that -x>0 or x<0. Since x<0 then the equation in question is true.
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RonPurewal
 Post subject: Re: IS ((x-3)^2)^1/2 = 3-x ?
 Post Posted: Tue Jul 21, 2009 7:34 pm 
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ManhattanGMAT Staff


Posts: 7146
please search before you post, thanks. this problem appears numerous times in this forum.

one of the threads - this one (click here) - was on the first page of the forum, almost directly below yours.

admittedly there are not a ton of useful search terms in this particular problem statement, but, even if you don't know what search terms to use, it's still helpful to scroll down the page and look to see if your problem is already there.
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jitenderjain065
 Post subject: Re: IS ((x-3)^2)^1/2 = 3-x ?
 Post Posted: Tue Jul 21, 2009 11:03 pm 
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Students


Posts: 17
alright Ron,
will do my best from now
to search
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Ben Ku
 Post subject: Re: IS ((x-3)^2)^1/2 = 3-x ?
 Post Posted: Thu Aug 06, 2009 4:15 pm 
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ManhattanGMAT Staff


Posts: 823
let us know if there's anything that you don't get after you've examined the previous explanations. Thanks!

_________________
Ben Ku
Instructor
ManhattanGMAT
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