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GPrep DS2

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Director
Joined: 01 Aug 2008
Posts: 725

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26 Apr 2009, 15:16
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Manager
Joined: 02 Mar 2009
Posts: 134

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27 Apr 2009, 01:06
1
KUDOS
(1): Since x<0, abs(x) will give a postive number which will cancel with the negative x. This will yield 0.

(2); Since y<1, It can either be 0 or negative. It cannot be a fraction because the question tells us that y is an integer. Now can it be negative? Y depens on x. If x is positive, y=2x (not possible in this case as y<1). If x is negative, the two x's will cancel and yield 0. Therefore y has to be 0.

D
Director
Joined: 01 Aug 2008
Posts: 725

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27 Apr 2009, 03:49
shkusira wrote:
(1): Since x<0, abs(x) will give a postive number which will cancel with the negative x. This will yield 0.

(2); Since y<1, It can either be 0 or negative. It cannot be a fraction because the question tells us that y is an integer. Now can it be negative? Y depens on x. If x is positive, y=2x (not possible in this case as y<1). If x is negative, the two x's will cancel and yield 0. Therefore y has to be 0.

D

got it .. thank you... I didn't realize that y = 2x case can't possible.

+1 for ya.

Appreciate.
Re: GPrep DS2   [#permalink] 27 Apr 2009, 03:49
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