If xy=1, What is the value of 2(x+y)^2/2(x-y)^2 A. 2 B. : PS Archive
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# If xy=1, What is the value of 2(x+y)^2/2(x-y)^2 A. 2 B.

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If xy=1, What is the value of 2(x+y)^2/2(x-y)^2 A. 2 B. [#permalink]

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28 Jul 2006, 01:45
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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

I just can't figure out a way past this one!
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28 Jul 2006, 01:58
this quest has been posted for hundreds of times.
We must have 2^((x+y)^2)/2^((x-y)^2) = 2^(4xy)=16
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28 Jul 2006, 04:07

but the Question in the Practice test doesn't say, 2^((x+y)^2)/2^(x-y)^2
It says, 2(x+y)^2/2(x-y)^2. Thats what got me stumped.

Is it a misprint on the Test itself? Is it possible?

I lost quite some time on this one.. as I thought I was missing something very simple on it.
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28 Jul 2006, 05:56

but the Question in the Practice test doesn't say, 2^((x+y)^2)/2^(x-y)^2
It says, 2(x+y)^2/2(x-y)^2. Thats what got me stumped.

Is it a misprint on the Test itself? Is it possible?

I lost quite some time on this one.. as I thought I was missing something very simple on it.

Yes there is a typo in question stem
You are not alone stucking with this problem
_________________

IE IMBA 2010

28 Jul 2006, 05:56
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