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GATE ECE 2004 | Question-21

The $z$-transform of a system is $H(z)=\frac{z}{z-0.2}.$ If the ROC is $|z|<0.2$, then the impulse response of the system is

  1. $(0.2)^{n} u[n]$
  2. $(0.2)^{n} u[-n-1]$
  3. $-(0.2)^{n} u[n]$
  4. $-(0.2)^{n} u[-n-1]$
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