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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Hi All, while studying the discrete Fourier transform, I came across this equality which I can't quite explain :
Ok. I answer myself. It's the partial sum of a geometric series of course.
Cheers