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 Algebra Pre-Algebra and Basic Algebra Math Forum

 September 20th, 2016, 02:11 AM #1 Senior Member   Joined: Jul 2011 Posts: 405 Thanks: 16 Binomial Series Sum Sum of series $\displaystyle \displaystyle \sum_{0\leq i  September 20th, 2016, 02:51 AM #2 Senior Member Joined: Aug 2016 From: morocco Posts: 273 Thanks: 32 here is a starting point write your sum S as S=$\sum_{i=0}^{n-1}\sum_{j=i+1}^{n}j\binom{n}{i}=\sum_{i=0}^{n-1}\binom{n}{i}\sum_{j=i+1}^nj$and use$1+2+3+....K=\frac{K(K+1)}{2}\$ Thanks from panky Tags binomial, series, sum Thread Tools Show Printable Version Email this Page Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Similar Threads Thread Thread Starter Forum Replies Last Post panky Algebra 0 September 15th, 2016 06:35 PM hihello123 Calculus 1 April 17th, 2016 08:27 PM 123qwerty Algebra 2 September 23rd, 2015 06:38 AM povilasb Pre-Calculus 8 December 25th, 2010 10:49 AM maliniarz Probability and Statistics 1 December 8th, 2010 06:14 PM

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