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enter image description here find period of DTFTs where vertical lines represent Dirac deltas

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  • $\begingroup$ are you in the same course as praneeth bharath? His question contains a screenshot of seemingly the same workbook. $$ $$ our problem with both questions is the same: we really can't help you if you're not even showing what you've tried so far, and where you've got stuck. You need to ask your own specific question! $\endgroup$ Jul 5, 2018 at 9:48
  • $\begingroup$ No I dont know who he is $\endgroup$
    – mpsimham
    Jul 5, 2018 at 12:31
  • $\begingroup$ I don't know on what basis I should consider them as 5-periodic signal or 15-periodic signnal $\endgroup$
    – mpsimham
    Jul 5, 2018 at 12:35

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