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ECE · Q288

Signal Processing

Engineering and GATE · ECE · question 288

Q288

Let X ( e^j ) = _n = - ^ x [ n ]e^ - j n and x [ n ] = 12 _ - ^ X ( e^j )e^j nd . If X ( e^j ) = 1 ( 1 - 0.2e^ - j ) ( 1 - 0.1e^ - j ), what is x[n] in terms of unit discrete step function u(n)?

Let      and
If       what is x[n] in terms of unit discrete step function u(n)?
A.
2(0.2)n u(n) - (0.1)n u(n)
Answer
B.
2(0.1)n u(n) - (0.2)n u(n)
C.
(0.2)n u(n) - (0.1)n u(n)
D.
(0.1)n u(n) - (0.2)n u(n)

Answer: Option A

Solution

Answer: Option A
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