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# GMATPrep question

Author Message
Intern
Joined: 05 Feb 2009
Posts: 1
Schools: wlu

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16 Feb 2009, 16:26
(2)^x - (2)^x-2 = 3(2^13)

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Senior Manager
Joined: 08 Jan 2009
Posts: 310

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16 Feb 2009, 18:56
2^ x ( 1- 2^-2) = 3 (2^13)

2^x( 1- 1/4) = 3(2^13)

2^x * 3/ 4 = 3 * 2^13

2 ^x = 2^2 * 2 ^15 so x =15

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Re: GMATPrep question   [#permalink] 16 Feb 2009, 18:56
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# GMATPrep question

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