Hi All, while studying the discrete Fourier transform, I came across this equality which I can't quite explain : How does a finite sum of complex exponentials lead to the fraction on the right hand side ? Thanks for any help Cheers

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- Jul 28th 2012, 09:07 AMalKwarizmi72discrete Fourier transform
Hi All, while studying the discrete Fourier transform, I came across this equality which I can't quite explain : How does a finite sum of complex exponentials lead to the fraction on the right hand side ? Thanks for any help Cheers

- Jul 30th 2012, 06:36 AMalKwarizmi72Re: discrete Fourier transform
Ok. I answer myself. It's the partial sum of a geometric series of course.

Cheers