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rampuria
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y is not zero, is (2^x/y)^x<1? 1). x>y 2). y< 0 27 Oct 2008, 05:31
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y is not zero, is (2^x/y)^xy
2). y< 0

Please explain your approach



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y is not zero, is (2^x/y)^x<1? 1). x>y 2). y< 0 27 Oct 2008, 07:41
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(2^x/y)^x = (2^x)^x/(y)^x

from (1) x > y --> x^x > y^x --> 2^x^x > y^x --> (2^x/y)^x > 1 and hence Sufficient

(2) does not talk about x ..Not Suffcient

Hence answer should be (A).
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y is not zero, is (2^x/y)^x<1? 1). x>y 2). y< 0 27 Oct 2008, 07:55
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i would go with B..

if y is negative then we have a fraction..
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y is not zero, is (2^x/y)^x<1? 1). x>y 2). y< 0 27 Oct 2008, 09:36
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rampuria
y is not zero, is (2^x/y)^x<1?
1). x>y
2). y< 0

Please explain your approach
Show more

agree with B.

(2^x/y)^x = 2^(x^2/y)

1) x > y : not sure about y, which could be -ve or +ve. Either is suff but we need to know y whether it is -ve or +ve.

2) y< 0 : y is -ve. suff. the power of 2 becomes -ve, yeilding a +vwe fraction value.
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y is not zero, is (2^x/y)^x<1? 1). x>y 2). y< 0 27 Oct 2008, 13:25
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rampuria
y is not zero, is (2^x/y)^x<1?
1). x>y
2). y< 0

Please explain your approach

agree with B.

(2^x/y)^x = 2^(x^2/y)

1) x > y : not sure about y, which could be -ve or +ve. Either is suff but we need to know y whether it is -ve or +ve.

2) y< 0 : y is -ve. suff. the power of 2 becomes -ve, yeilding a +vwe fraction value.
Show more

Oh.. I got the question wrong. I read it as 2^x is divided by y and complete thing raised ti power x. It looks like the stem is 2 raised to the power x/y and complete thing raised to power x.
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y is not zero, is (2^x/y)^x<1? 1). x>y 2). y< 0 27 Oct 2008, 14:08
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krishan
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rampuria
y is not zero, is (2^x/y)^xy
2). y y : not sure about y, which could be -ve or +ve. Either is suff but we need to know y whether it is -ve or +ve.

2) y< 0 : y is -ve. suff. the power of 2 becomes -ve, yeilding a +vwe fraction value.

Oh.. I got the question wrong. I read it as 2^x is divided by y and complete thing raised ti power x. It looks like the stem is 2 raised to the power x/y and complete thing raised to power x.
Show more

Yep! I was wondering whether the Q is

\(( 2 ^ (x/y) ) ^ x or ( ( 2 ^ x) / y ) ^ x\)



Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Data Sufficiency (DS) Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
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