And Because the spectrum of a discrete time signal, this very same spectrum will periodically repeat if we prolonged the frequency higher further than $f_s$ this kind of which the spectrum revealed is likewise a similar spectrum in every single frequency band from $nf_s$ to $(n+one)f_s$ for any integer $n$. https://boyspgsector14gurgaon.blogspot.com/2025/07/find-ideal-boys-pg-in-gurgaon-sector-15.html