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electronics and communication engineering exam question papers
1. The signal x(t) is described by Two of the angular frequencies at which its fourier transform becomes zero are
(A): 0, p
(B): 0.5p , 1.5p
(C): 2p , 2.5p
(D): p , 2p
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By: guest on 02 Jun 2017 12.56 am
X(jω) = 1.e-jωt = At ω = 0 X(j0) = 2 At ω = p X(jp ) = 0 ω = 2p X(j2p ) = 0
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