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April 12th, 2012, 09:32 AM  #1 
Newbie Joined: Apr 2012 Posts: 1 Thanks: 0  Series Question  Convergence
3 + (3/4) + (3/ + (3/16) + (3/32)... I cannot solve the sigma notation. Can anyone assist? I think it may be 3 + Sigma (3 / 2 ^ (n+1) ) However, I cannot get it into Geo Sum notation so I can use S = a / (1 + r) to find where it converges. 
April 12th, 2012, 12:00 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  Convergence
I would write the series as: 

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convergence, question, series 
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