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# Which of the following must be true about x?

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Manager
Joined: 11 Jan 2008
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Which of the following must be true about x? [#permalink]  29 Dec 2008, 15:32
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vars.GIF [ 3.44 KiB | Viewed 722 times ]

oa is : select text
oa is "b" x > -1 , but x=1 fails the inequality.
not sure how it is b
Manager
Joined: 27 May 2008
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Re: complex variable q. [#permalink]  29 Dec 2008, 21:04
$$x/|x|$$ $$< X$$ can be negative or positive based on the value of X.

if X is positive, for example

2/2 <2 -- CORRECT for any value of X > 1 (Dont be carried away with this answer, this is GMAT be alert, most of GMAT questions will not be this easy, there will be a trick hidden inside )

Also, if X is negative, for example,

-.2/.2 <-.2 , but it cannot be -2/2 < -2 so CORRECT for any value of X > -1

here combining both X should be X>-1

So B
Manager
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Re: complex variable q. [#permalink]  29 Dec 2008, 22:08
if x > -1 then what about X = 1

it is 1/1 < 1 which is false...

not sure if i missing something in this.
Re: complex variable q.   [#permalink] 29 Dec 2008, 22:08
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