ISRO Electronics & Communication (ECE) 2011 - Question 3

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Topic: Signals and Systems

If Z transform of $x(n)$ is $X(z)$ then the Z transform of $x(n-k)$ is

  • A. $X(z^{-k}z)$
  • B. $X(z^{k}z)$
  • C. $z^{-k}X(z)$
  • D. $z^{k}X(z)$

Answer: C. $z^{-k}X(z)$

Explanation: $x(n-k) \xrightarrow{z-transform} z^{-k}X(z)$

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