DS - inequalities with two unknowns : DS Archive
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# DS - inequalities with two unknowns

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Manager
Joined: 25 Aug 2007
Posts: 70
Schools: HBS '10
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DS - inequalities with two unknowns [#permalink]

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13 Oct 2007, 16:52
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Director
Joined: 03 May 2007
Posts: 886
Schools: University of Chicago, Wharton School
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Re: DS - inequalities with two unknowns [#permalink]

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13 Oct 2007, 22:55
Is xy>0?

1: x - y > -2 ................I
nsf
2: x - 2y < - 6
- x + 2y > 6 ................II

1 and 2: solve for x and y, x > 2 and y > 4. sufficient.

C..
Re: DS - inequalities with two unknowns   [#permalink] 13 Oct 2007, 22:55
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