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Undefined form of an expression

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blink005
 Post subject: Undefined form of an expression
 Post Posted: Fri Sep 30, 2011 6:57 am 
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Students


Posts: 6
Hi,
I found this Data Sufficiency question on a forum; I don't know the source.

http://gmatclub.com/forum/is-x-y-less-t ... ml#p980656

Question-
Is x^y less than or equal to y^x?

1) rootx=y

2) x=2y

1+2
One of the possible solutions is y=0
x^y is 0^0
y^x is 0^0

So, is it C or E?
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mba.dream.2013
 Post subject: Re: Undefined form of an expression
 Post Posted: Fri Sep 30, 2011 12:22 pm 
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Forum Guests


Posts: 3
I ran into one of the older posts and it was clearly indicated that

"Don't worry about 0^0 - there's some disagreement among mathematicians about whether it equals zero or is undefined. You won't need to evaluate 0^0 on the GMAT."

0-characteristics-t675.html
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blink005
 Post subject: Re: Undefined form of an expression
 Post Posted: Sat Oct 01, 2011 5:17 am 
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Students


Posts: 6
thanks

_________________
HTH
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jnelson0612
 Post subject: Re: Undefined form of an expression
 Post Posted: Sat Oct 29, 2011 11:46 pm 
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ManhattanGMAT Staff


Posts: 1857
Thanks!

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Jamie Nelson
ManhattanGMAT Instructor
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