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June 11th, 2012, 11:27 AM  #1 
Newbie Joined: Jul 2011 Posts: 5 Thanks: 0  How do you know if it is positive or negative infinity?
lim >  inf ((1x^4)/(x^2+5x))^5 = inf lim > inf ((1x^3)/(x^2+4x))^7 = inf I don't understand how it turns out to be positive or negative infinity. Thanks for the help guys. 
June 11th, 2012, 11:56 AM  #2 
Math Team Joined: Nov 2010 From: Greece, Thessaloniki Posts: 1,989 Thanks: 133 Math Focus: pre pre pre pre pre pre pre pre pre pre pre pre calculus  Re: How do you know if it is positive or negative infinity? 

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infinity, negative, positive 
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