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Is x^2 greater than x? (1) x^2 is greater than 1. (2) x is

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Is x^2 greater than x? (1) x^2 is greater than 1. (2) x is [#permalink] New post 21 May 2008, 02:13
Is x^2 greater than x?

(1) x^2 is greater than 1.
(2) x is greater than -1.
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Re: Data sufficiency [#permalink] New post 21 May 2008, 02:30
ritula wrote:
Is x^2 greater than x?

(1) x^2 is greater than 1.
(2) x is greater than -1.


A

The question is similar to x<0 and x>1 ?

1. x^2 >1 --> x<-1 and x>1, sufficient
2. x>-1, x can belong to (0,1),so x^2 is NOT greater than x.
and x can be >1, so x^2 IS GREATER than x
not suff
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Re: Data sufficiency [#permalink] New post 21 May 2008, 04:30
A for me too.

X^2 >1 means -> x could be + or -ve but x^2 would always be +ve sufficient

stmt-2 ->x > -1, if x=0, x^2=0 this insuff.

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Re: Data sufficiency   [#permalink] 21 May 2008, 04:30
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Is x^2 greater than x? (1) x^2 is greater than 1. (2) x is

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