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illusion
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0 with exponent 27 Sep 2007, 00:22
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if lXl = X^-1 , what is the value of X ?

I solved it for 1 and 0, while OA is 1.
Can't understand Why it can't be 0. Can somebody help !

One more question, is 0^0 a non-existent number....or we can set it equal to 1 ?
Thanks



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beckee529
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0 with exponent 27 Sep 2007, 00:24
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illusion
if lXl = X^-1 , what is the value of X ?

I solved it for 1 and 0, while OA is 1.
Can't understand Why it can't be 0. Can somebody help !
Show more


you cannot divide by 0
X^-1 = 1/X = 1/0 (undefined)
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illusion
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0 with exponent 27 Sep 2007, 00:26
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beckee529
illusion
if lXl = X^-1 , what is the value of X ?

I solved it for 1 and 0, while OA is 1.
Can't understand Why it can't be 0. Can somebody help !

you cannot divide by 0
X^-1 = 1/X = 1/0 (undefined)
Show more


oh thats really quick :)...thanks, I was missing this simple thing :oops: how do we explain 0^0 ?
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beckee529
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0 with exponent 27 Sep 2007, 00:26
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illusion
if lXl = X^-1 , what is the value of X ?

I solved it for 1 and 0, while OA is 1.
Can't understand Why it can't be 0. Can somebody help !

One more question, is 0^0 a non-existent number....or we can set it equal to 1 ?
Thanks
Show more


I believe we've had this dicussion before. 0^0 is undefined for GMAT (even though technically in math it is 1)
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ywilfred
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0 with exponent 27 Sep 2007, 00:54
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|x| = 1/x

So it must be 1. 0 will be undefined.
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anonymousegmat
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0 with exponent 27 Sep 2007, 08:14
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beckee529
illusion
if lXl = X^-1 , what is the value of X ?

I solved it for 1 and 0, while OA is 1.
Can't understand Why it can't be 0. Can somebody help !

One more question, is 0^0 a non-existent number....or we can set it equal to 1 ?
Thanks

I believe we've had this dicussion before. 0^0 is undefined for GMAT (even though technically in math it is 1)
Show more


thats weird. i typed 0^0 in google calculator just to make sure.

why would the GMAT have that as a rule if it isn't true mathmatically? that doesn't seem fair



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 Quantitative Questions 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!