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Signals and Systems

Q1:

check the following system for causality
  1. y[n] = x[n] + 2x[n - 1]
  2. y[n] = x[n - k]
  3. y[n] = x[2n]

A (1) and (2)

B (2) and (3)

C (1) omly

D (1) and (3)

ANS:C - (1) omly

A system satisfies causality if the present output depends upon the present and past values of input.



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