1.

What is the auto correlation of the sequence x(n)=anu(n), 0

A. \(\frac{1}{1-a^2}\) al (l≥0)
B. \(\frac{1}{1-a^2}\) a-l (l<0)
C. \(\frac{1}{1-a^2}\) a|l|(-∞<l<∞)
D. All of the mentioned
Answer» E.


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