Discussion :: Exam Questions Paper
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The transfer function of a discrete time LTI system is given by
Consider the following statements:
S1: The system is stable and causal for ROC: |z| > 1/2
S2: The system is stable but not causal for ROC: |z| < 1/4
S3: The system is neither stable nor causal for ROC: 1/4 < |z| < 1/2
Which one of the following statements is valid?
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A.
Both S1 and S2 are true
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B.
Both S2 and S3 are true
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C.
Both S1 and S3 are true
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D.
S1, S2 and S3 are all true
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Answer : Option C
Explanation :
S1 true, S2 False (meter stable nor causal) S3 True.
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