Problem with double sums
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how to write this function in MATLAB knowing that if I separate the two sums as I wrote one tends to infinity.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/256696/image.png)
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/256697/image.png)
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/256698/image.png)
The first idea I wrote
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/256703/image.png)
then check my code in some values of f as an example
but the result is
because ![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/256702/image.png)
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/256700/image.png)
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/256701/image.png)
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/256702/image.png)
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