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Inequality

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Source: — Data Sufficiency |

by pemdas » Thu Aug 11, 2011 4:05 am
this must be simple, given z^4 is always positive, we need to know if both x and y are positive or if they are both negative
st(1) xy>z^4 says that xy must be positive in anyway, Sufficient
st(2)x>z is Not Sufficient, as we don't know y

a
jayanti wrote:Q) Given that X,Y,Z are non zero integers. IS X^3Y^5Z^4>0?
(1) XY > Z^4
2) X > Z


Correct answer is A.
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