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03 Sep 2008, 14:16
Kudos
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Here is the question that made me crazy and that wiped almost 5 min out.
Could u plz, share ur approach to solve it as fast as possible.
If xy=1 then what is the value of [2(x+y)^2] / [2(x-y)^2]
a. 2
b. 4
c. 8
d. 16
e. 32
source GmatPrep.
Could u plz, share ur approach to solve it as fast as possible.
If xy=1 then what is the value of [2(x+y)^2] / [2(x-y)^2]
a. 2
b. 4
c. 8
d. 16
e. 32
source GmatPrep.
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03 Sep 2008, 14:29
Kudos
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Unless I am reading something wrong , I do not think we can anser this question with the information provided :
xy=1 then what is the value of [2(x+y)^2] / [2(x-y)^2]
lets consider 2 sets of values for x and Y (2,1/2) and (3,1/3)
the value for the 1st expression will be = [2(x+y)^2] / [2(x-y)^2] =[ 1.5^2/.5^2]=9
the valuse for the 2nd set will be = [ 1.33^2 / .67^2 ] = 4
so the valuse can be anything unless some more information is given.. can you please check that you have written the expression correctly [2(x+y)^2] / [2(x-y)^2]
xy=1 then what is the value of [2(x+y)^2] / [2(x-y)^2]
lets consider 2 sets of values for x and Y (2,1/2) and (3,1/3)
the value for the 1st expression will be = [2(x+y)^2] / [2(x-y)^2] =[ 1.5^2/.5^2]=9
the valuse for the 2nd set will be = [ 1.33^2 / .67^2 ] = 4
so the valuse can be anything unless some more information is given.. can you please check that you have written the expression correctly [2(x+y)^2] / [2(x-y)^2]
03 Sep 2008, 14:32
Kudos
Bookmarks
I wrote the question as it appeared.
When I saw this question first thing that popped up in my mind was THIS QUESTION IS ABNORMAL.
Indeed, we cannot solve it with the given structure.
When I saw this question first thing that popped up in my mind was THIS QUESTION IS ABNORMAL.
Indeed, we cannot solve it with the given structure.
