July 23rd, 2017, 10:05 PM  #1 
Newbie Joined: Jul 2017 From: Makakilo Posts: 3 Thanks: 0  Finite geometric series
I was working on this problem and I was not able to find a starting term to use with the summation formulas for geometric series. 
July 24th, 2017, 09:23 AM  #2 
Global Moderator Joined: Dec 2006 Posts: 20,469 Thanks: 2038 
The sequence has first term $(u_1 + u_1r)^2$, common ratio $r^2\!$, and $n  1$ terms.

July 24th, 2017, 11:44 AM  #3 
Math Team Joined: Dec 2013 From: Colombia Posts: 7,635 Thanks: 2620 Math Focus: Mainly analysis and algebra 
Start by writing the given terms of the second sequence in terms of $u_1$.

July 26th, 2017, 11:49 AM  #4 
Newbie Joined: Jul 2017 From: Makakilo Posts: 3 Thanks: 0 
Okay that makes sense, Thanks.


Tags 
finite, geometric, series 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Using series manipulations to find the sums of finite series  stevewilliams  Algebra  1  April 22nd, 2016 01:40 PM 
Is finding laurent series expansion of f at z_0 using geometric series convenient?  king.oslo  Complex Analysis  0  December 28th, 2014 06:50 AM 
Convergent series > series of geometric means converges  The Chaz  Real Analysis  11  February 7th, 2011 04:52 AM 
sequences and series: geometric series  cindyyo  Algebra  2  August 24th, 2008 01:25 AM 
Geometric series/target of series/etc...  clooneyisagenius  Real Analysis  1  January 30th, 2008 12:50 AM 