If ab > cd and a, b, c and d are all greater than zero, : PS Archive
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# If ab > cd and a, b, c and d are all greater than zero,

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Joined: 21 Jun 2006
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If ab > cd and a, b, c and d are all greater than zero, [#permalink]

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25 Jun 2007, 18:22
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If ab > cd and a, b, c and d are all greater than zero, which of the following CANNOT be true?

1. c > b
2. d > a
3. b/c<d>d/b
5. (cd)^2 < (ab)^2
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Joined: 13 Mar 2007
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Schools: MIT Sloan
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25 Jun 2007, 19:07
didn check for 3) but eliminated others ..so shud be 3 !
25 Jun 2007, 19:07
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