Hi
I want to plot this summation. I would like to do it as an 'odd summation', were I don't want it to process n=2. Is there an easy solution for this problem?
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I would have interpreted "odd" so that the sums should run only over the odd numbers 1,3,5,... so n=2 would be no problem at all.
What do you mean by "plotting the sum"?
If your sum should run from 1 up to infinity (including the even numbers) I see two ways to avoid the case n=2:
1) use something like if(n=2, 0, <the expression you'd like to sum up>) in the sum
2) Let the sum run from 3 up to infinity and add the result you get for n=1
Nonetheless I would expect that n should only take od numbers as otherwise (-1)^((n+1)/2) = imaginary unit .
So maybe you are looking for something like this:
I would have interpreted "odd" so that the sums should run only over the odd numbers 1,3,5,... so n=2 would be no problem at all.
What do you mean by "plotting the sum"?
If your sum should run from 1 up to infinity (including the even numbers) I see two ways to avoid the case n=2:
1) use something like if(n=2, 0, <the expression you'd like to sum up>) in the sum
2) Let the sum run from 3 up to infinity and add the result you get for n=1
Nonetheless I would expect that n should only take od numbers as otherwise (-1)^((n+1)/2) = imaginary unit .
So maybe you are looking for something like this:
Hi Werner
Is there a way where I can make a summation of ONLY the odd numbers n=1,3,5,7..? That would solve my problem
I tried your second option (as I could not find a way to do the first option), but it would be nice if there was a more pretty way to do it? 🙂
