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arjtryarjtry
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is |x^2-3|>2 1) x^2 is an integer 2) x is a prime integer 06 Sep 2008, 20:35
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is |x^2-3|>2

1) x^2 is an integer
2) x is a prime integer and is not a factor of 128.



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is |x^2-3|>2 1) x^2 is an integer 2) x is a prime integer 06 Sep 2008, 20:41
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arjtryarjtry
is |x^2-3|>2

1) x^2 is an integer
2) x is a prime integer and is not a factor of 128.
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1: if x = 1 or 2 pr 3, nsf.
2: so x is not 2 but could be 3 or 5 or 7 or so on. nsf.
togather also x could be 3. nsf.

//E//
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arjtryarjtry
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is |x^2-3|>2 1) x^2 is an integer 2) x is a prime integer 06 Sep 2008, 20:50
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this was my own creation...
i thought that the only way to work on my weak point is to create problems...
:P
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GMBA85
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is |x^2-3|>2 1) x^2 is an integer 2) x is a prime integer 07 Sep 2008, 00:17
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arjtryarjtry
is |x^2-3|>2

1) x^2 is an integer
2) x is a prime integer and is not a factor of 128.

1: if x = 1 or 2 pr 3, nsf.
2: so x is not 2 but could be 3 or 5 or 7 or so on. nsf.
togather also x could be 3. nsf.

//E//
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Could you please explain why is option 2 not sufficient?
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is |x^2-3|>2 1) x^2 is an integer 2) x is a prime integer 07 Sep 2008, 00:27
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GMBA85
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arjtryarjtry
is |x^2-3|>2

1) x^2 is an integer
2) x is a prime integer and is not a factor of 128.

1: if x = 1 or 2 pr 3, nsf.
2: so x is not 2 but could be 3 or 5 or 7 or so on. nsf.
togather also x could be 3. nsf.

//E//

Could you please explain why is option 2 not sufficient?
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you are correct. its in fact //B//.

i overlooked x^2 as x.
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is |x^2-3|>2 1) x^2 is an integer 2) x is a prime integer 07 Sep 2008, 00:37
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you are correct. its in fact //B//.

i overlooked x^2 as x.[/quote]

GMAT TIGER - thx for the quick reply

arjtryarjtry - awaiting more of such questions from you. It definitely helps u clear fundae and brings quite a bit of clarity. well done!
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is |x^2-3|>2 1) x^2 is an integer 2) x is a prime integer 08 Sep 2008, 01:45
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I also fell into trap......wrongly took x for x^2.

arjtryarjtry, well made question.



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