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GMATPrep - Please Help!!

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by ricky » Wed Jul 30, 2008 9:24 am
image is not clear mate.is it [2(x+y)^2]/[2(x-y)^2] ?
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by Ian Stewart » Wed Jul 30, 2008 10:07 am
This question is not printed correctly - one of two or three errors you might come across in GMATPrep. It should read:

2^[(x+y)^2] / 2^[(x-y)^2]
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by sudhir3127 » Wed Jul 30, 2008 10:07 am
Me not sure abt the image as well..but my guess is it shud be

2^(x+y)^2 divided by 2^(x-y)^2

therefore

solving the exponent

(x+y)^2- (x-y)^2= 4xy = 4(1) = 4

hence the naswer is 2^4= 16.

Let me know if u have any doubts..
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by harish » Wed Jul 30, 2008 9:40 pm
Thanks everyone..
How foolish..I dint realise it was 2^(x+y)^2
I thought it was 2(x+y)^2
Some part of the blame also goes to the way it is shown..not clear if it is 2^( or 2(
Thanks anyway..
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by Ian Stewart » Thu Jul 31, 2008 2:45 am
harish wrote:Thanks everyone..
How foolish..I dint realise it was 2^(x+y)^2
I thought it was 2(x+y)^2
Some part of the blame also goes to the way it is shown..not clear if it is 2^( or 2(
Thanks anyway..
It's not your fault- it's a problem with the display of the question. That is, it's GMATPrep's fault. As the question is displayed now, you were perfectly correct to assume what you did.

If you see exponents on the real GMAT, it will be obvious that they are exponents.
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