April 29th, 2012, 12:27 PM  #1 
Member Joined: Aug 2011 Posts: 71 Thanks: 0  Calculation of sum
Help me please to calculate/approximate the following sum: for any Thank you in advance. 
April 29th, 2012, 12:44 PM  #2 
Global Moderator Joined: May 2007 Posts: 6,728 Thanks: 689  Re: Calculation of sum
Does n = l? In that case for odd q's the answer is 0.

April 29th, 2012, 04:12 PM  #3 
Member Joined: Aug 2011 Posts: 71 Thanks: 0  Re: Calculation of sum
Yes, you are right. . But what about even . And ?

April 30th, 2012, 01:09 PM  #4  
Global Moderator Joined: May 2007 Posts: 6,728 Thanks: 689  Re: Calculation of sum Quote:
 

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