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If xy=1, what is the value of 2^^2/2^^2 A) 2 B) 4 C) 8

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Joined: 06 Feb 2006
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If xy=1, what is the value of 2^^2/2^^2 A) 2 B) 4 C) 8  [#permalink]

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12 Nov 2006, 05:21
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If xy=1, what is the value of 2^[(x+y)]^2/2^[(x-y)]^2

A) 2
B) 4
C) 8
D) 16
E) 32

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SVP
Joined: 01 May 2006
Posts: 1794

Kudos [?]: 169 [0], given: 0

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12 Nov 2006, 05:27
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Have a look on this one : http://www.gmatclub.com/phpbb/viewtopic.php?t=38273

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12 Nov 2006, 05:27
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