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# Is x positive? (1) 3x^2 > x (2) xy > y

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Math Expert
Joined: 02 Sep 2009
Posts: 49968
Is x positive? (1) 3x^2 > x (2) xy > y  [#permalink]

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10 Mar 2017, 04:05
00:00

Difficulty:

(N/A)

Question Stats:

86% (01:24) correct 14% (00:13) wrong based on 16 sessions

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Is x positive?

(1) 3x^2 > x
(2) xy > y

_________________
Manager
Joined: 05 Apr 2014
Posts: 140
Location: India
Schools: ISB '19, Fox"19
GMAT 1: 660 Q48 V33
GPA: 3

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10 Mar 2017, 04:35
E

Statement 1
3xsqr -x >0
x is positive between 0 and 1/3 and negative for rest x
Insufficient

Statement 2
Here xy - y > 0
Here we knw nothing about sign of u so we can't say whether x is positive or not
Here y (x -1) > 0
Means
Either y >0 and x> 1
Or y < 0 and x <1

Insufficient

Using both
We still can't arrive at a consensus
E

Posted from my mobile device
&nbs [#permalink] 10 Mar 2017, 04:35
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