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February 26th, 2014, 11:35 AM  #1 
Member Joined: Sep 2013 Posts: 75 Thanks: 0  geometric series; find nth term
8x^2 + 4x^3 + 2x^4 Find nth term? T2÷T1 = T3÷T2 = r I got 1/2x = r; then I stuck! 
February 26th, 2014, 12:32 PM  #2  
Math Team Joined: Dec 2006 From: Lexington, MA Posts: 3,267 Thanks: 408  Re: geometric series; find nth term Hello, bongantedd! Are you familiar with Geometric Series formulas? Quote:
 
February 26th, 2014, 04:38 PM  #3 
Global Moderator Joined: Dec 2006 Posts: 20,921 Thanks: 2203 
If the series were just x^2 + x^3 + x^4, etc., one could just write the answer almost instantly.


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