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GATE ECE 2010 | Question-14

Consider the $z$-transform $X(z)=5 z^2+4 z^{-1}+3 ; 0<|z|<\infty$. The inverse $z$-transform $x[n]$ is

  1. $5 \delta[n+2]+3 \delta[n]+4 \delta[n-1]$
  2. $5 \delta[n-2]+3 \delta[n]+4 \delta[n+1]$
  3. $5 u[n+2]+3 u[n]+4 u[n-1]$
  4. $5 u[n-2]+3 u[n]+4 u[n+1]$
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