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Re: x < 1/y, and x and y are positive [#permalink]
1
x < (1/y) and since "x and y are positive," xy < 1

First divide QA by x and QB by y to get:

QA = (2/x) + 1 - x

QB = 2y + 1 - (1/y)

Subtract 1 from both QA and QB, add 1/y to each side, and add x to either side to get:

QA = (2/x) + (1/y)

QB = 2y + x

Let's clean up QA to find a common denominator :

QA = (2y+x)/xy

Now, since the numerators of QA and QB, are the same and x and y are both positive, we can divide each to get:

QA = 1/xy

QB = 1

As xy < 1, then 1/xy > 1, so QA > QB and therefore the answer is Choice A
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Re: x < 1/y, and x and y are positive [#permalink]
Hello from the GRE Prep Club BumpBot!

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Re: x < 1/y, and x and y are positive [#permalink]
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