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Consider a discrete time signal x[n] and its z-transform X(z) given as:
If ROC of X(z) is |z| < 1,="" then="" signal="" x[n]="" would="" />
  • a)
    [- 2(3)n + (- 1)n] u [- n - 1]
  • b)
    [2(3)n - (- 1)n] u [n]
  • c)
    - 2(3)n u [- n - 1] - (- 1)n u[n]
  • d)
    [2(3)n + 1] u [n]
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
Consider a discrete time signal x[n] and its z-transform X(z) given a...
ROC: |z| < 1,="" which="" is="" not="" exterior="" of="" a="" circle="" outside="" the="" outermost="" pole="" z="3." so,="" x[n]="" is="" anticausal="" given="" />
x[n] = [- 2(3)n + (- 1)n] u [- n - 1]
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Community Answer
Consider a discrete time signal x[n] and its z-transform X(z) given a...
ROC: |z| < 1,="" which="" is="" not="" exterior="" of="" a="" circle="" outside="" the="" outermost="" pole="" z="3." so,="" x[n]="" is="" anticausal="" given="" />
x[n] = [- 2(3)n + (- 1)n] u [- n - 1]
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Consider a discrete time signal x[n] and its z-transform X(z) given as:If ROC of X(z) is |z| a)[- 2(3)n + (- 1)n] u [- n - 1]b)[2(3)n - (- 1)n] u [n]c)- 2(3)n u [- n - 1] - (- 1)n u[n]d)[2(3)n + 1] u [n]Correct answer is option 'A'. Can you explain this answer?
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