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Re: power prep DS

by pbanavara » Mon Dec 15, 2008 6:47 pm
logitech wrote:
Feruza Matyakubova wrote:is xy>0 ?

1. x-y>-2
2. x-2y<-6
x-y>-2
-x+2y>6
+
----------------------

y>4

x>2

xy>0

C
And I broke my head for 5 mins to get E. Good one dude

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