August 7th, 2011, 10:39 AM  #1 
Senior Member Joined: Jul 2011 Posts: 405 Thanks: 16  limit with polynomial
If be the positive root of the equation Then find 
August 7th, 2011, 01:52 PM  #2 
Senior Member Joined: May 2011 Posts: 501 Thanks: 6  Re: limit with polynomial If , then we get . Thus, So, evaluate the limit 
August 7th, 2011, 06:14 PM  #3 
Senior Member Joined: Jul 2011 Posts: 405 Thanks: 16  Re: limit with polynomial
thanks galactus but can anyone explain me first line. 
August 9th, 2011, 05:36 AM  #4 
Math Team Joined: Sep 2007 Posts: 2,409 Thanks: 6  Re: limit with polynomial
You have miscopied. The first line was . The right side is "", not just "". You said, in your first post, that is a root of . That means that satisfies . 

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