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08 May 2006, 07:38
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Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
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What is the value of x?
1) x^4 = |x|
2) x^2 > x
Please explain how you arrived at your answer.
1) x^4 = |x|
2) x^2 > x
Please explain how you arrived at your answer.
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
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08 May 2006, 08:16
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Hallo remgeo,
from A X^4=IXI possible solutions 1,-1 and 0 (SubstituteIXI=+/-X)
NOT SUFF
From B X^2>X or X^2-X>0 or X*(X-1)>0
Either X>0 and X>1 which means X>1
OR X<0 and X<1 which means X<0
For B X(-inf;0) & (1;+inf)-NOT SUFF
FROM both x=-1 so C
from A X^4=IXI possible solutions 1,-1 and 0 (SubstituteIXI=+/-X)
NOT SUFF
From B X^2>X or X^2-X>0 or X*(X-1)>0
Either X>0 and X>1 which means X>1
OR X<0 and X<1 which means X<0
For B X(-inf;0) & (1;+inf)-NOT SUFF
FROM both x=-1 so C
08 May 2006, 11:07
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Agreed C
1: -1, 0, 1
2: Almost any number not in the range 0<=x<=1
1+2: gives us the intersection that is -1
Hence, C!
1: -1, 0, 1
2: Almost any number not in the range 0<=x<=1
1+2: gives us the intersection that is -1
Hence, C!
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!
