If a(n) is the response of a linear, time-invariant, discrete

Home » Signals and Systems » Signal and systems miscellaneous » Question

If a(n) is the response of a linear, time-invariant, discrete time system to a unit step input, then the response of the same system to a unit impulse input is—

1. d [a(n)]
  dn
2. na(n)
3. a(n) – a(n – 1)
4. a(n + 1) – 2a(n) + a(n – 1)

Correct Option: A

NA