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Updated on: 17 Sep 2007, 19:33
Originally posted by somethingbetter on 17 Sep 2007, 16:08.
Last edited by somethingbetter on 17 Sep 2007, 19:33, edited 2 times in total.
Last edited by somethingbetter on 17 Sep 2007, 19:33, edited 2 times in total.
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Guys, could anybody explain concept of absolute values. How to start analyzing these Questions? See how I get stuck--- if we take the previous Q(in this forum) where DS problem says-
If n is not equal to 0, is |n|>4
(1) n^2>16
(2) 1/|n| > n
since all absolute values are always positive, n, actually, could also be negative so
[ Ac/Statement 1 ]-
+n>4 and
-n>4 [ if we multiply both sides by -ve sign, we invert the inequality sign (right??) ]means: n<-4
how is that possible for n to be bigger than 4 and smaller than -4??????????
Obviously, I made some fundamental mistake but what's that??
If n is not equal to 0, is |n|>4
(1) n^2>16
(2) 1/|n| > n
since all absolute values are always positive, n, actually, could also be negative so
[ Ac/Statement 1 ]-
+n>4 and
-n>4 [ if we multiply both sides by -ve sign, we invert the inequality sign (right??) ]means: n<-4
how is that possible for n to be bigger than 4 and smaller than -4??????????
Obviously, I made some fundamental mistake but what's that??
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 below for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
17 Sep 2007, 19:44
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St1:
(n+4)(n-4) > 0
n > 4 and n <4> n
LHS 1/|n| is always positive. But n could either be a positive fraction, or a negative value.
If n = 1/2, then 1/|n| > n but |n| <4> n but |n| > 4
Insufficient.
Ans A
(n+4)(n-4) > 0
n > 4 and n <4> n
LHS 1/|n| is always positive. But n could either be a positive fraction, or a negative value.
If n = 1/2, then 1/|n| > n but |n| <4> n but |n| > 4
Insufficient.
Ans A
