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GMAT prep -- algebra


 
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vinviper1
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PostPosted: Wed Apr 23, 2008 10:18 am    Post subject: GMAT prep -- algebra Reply with quote
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luvaduva
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PostPosted: Wed Apr 23, 2008 7:36 pm    Post subject: Reply with quote
Something doesn't seem right with the answer choices.

Since xy = 1, x=y=1 or x=y=-1 or x and y are reciprocols.

The denominator would yield 0 with either 1 or -1 so they are reciprocols.

I plugged in 2 and 1/2 and got 25/9 as an answer.

I get the same answer for other values of x and y also.

Anyone else think something is wrong with this problem or am I making a mistake?
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gabriel
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PostPosted: Thu Apr 24, 2008 7:03 am    Post subject: Reply with quote
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