Electronics and Communication Engineering - Signals and Systems - Discussion
Discussion Forum : Signals and Systems - Section 2 (Q.No. 41)
41.
Let 
be the Fourier transform of y(n), then y(ej0) is
be the Fourier transform of y(n), then y(ej0) isAnswer: Option
Explanation:
.
Discussion:
4 comments Page 1 of 1.
Arnab said:
8 years ago
It should be 4/3 as it needs answer at w=0 not n=0.
NARENDRA KUMAR said:
8 years ago
Yeah, answer should be D.
Amod kumar Jha said:
8 years ago
Yeah, the answer should be 4/3.
Because after putting w=0, summation becomes on GP. Here r=1/4.
Sum of gp= 1 ÷ (1-1/4) = 4/3.
Because after putting w=0, summation becomes on GP. Here r=1/4.
Sum of gp= 1 ÷ (1-1/4) = 4/3.
Devyanee said:
9 years ago
I think it sholud be 4/3.
=> a^n u[n]<-->1/(1 - a * e^-jw). So putting a = 1/4 and w = 0, 1/(1 - 0.25) so 4/3.
=> a^n u[n]<-->1/(1 - a * e^-jw). So putting a = 1/4 and w = 0, 1/(1 - 0.25) so 4/3.
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