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December 17th, 2011, 07:54 PM  #1 
Senior Member Joined: Sep 2011 From: New York, NY Posts: 333 Thanks: 0  series question  might be an algebra question In the last step where the limit is present. The step showing the result of dividing everything by . Does anyone know why they didn't divide the 2 in the denominator by ? 
December 17th, 2011, 08:05 PM  #2 
Senior Member Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,193 Thanks: 504 Math Focus: Calculus/ODEs  Re: series question  might be an algebra question
Yes, the denominator consists of two factors. Consider two factors a and b: Now, if we divide these factors by a quantity x, we may write: We would not write: 
December 17th, 2011, 08:28 PM  #3 
Senior Member Joined: Sep 2011 From: New York, NY Posts: 333 Thanks: 0  Re: series question  might be an algebra question
ok, thank you. I see.


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