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The original was posted on /r/askelectronics by /u/No_Race_5228 on 2023-08-07 19:57:40+00:00.

Hello everybody, I’m facing an exam in signal and systems. Today I saw an exercise where you were supposed to add something to the transfer-function of a z-transformation so that signals with a frequency of 50 Hz will get suppressed. How would I achieve this. Thanks in advance!