Causal and time variant

  1. 1.g(t) = f(t) + f(-t)
    2. g(t)= f(t/2)
    can someone pls explain why these functions are time variant and non causal
  2. jcsd
  3. Gokul43201

    Gokul43201 11,044
    Staff Emeritus
    Science Advisor
    Gold Member

    This sounds like it's from a DSP course. Is it ? Are you talking about filters ?
  4. yeah I am !! they are filters.
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