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1. |
The Fourier series coefficient of time domain signal x (t) is X[k] = ((- frac{1}{3})^{|k|} ). The fundamental frequency of signal is =1. The signal is _____________ |
A. | ( frac{4}{5 + 3 sin u2061} ) |
B. | ( frac{5}{4 + 3 sin u2061t} ) |
C. | ( frac{5}{4 + 3 cos u2061t} ) |
D. | ( frac{4}{5 + 3 sin u2061t} ) |
Answer» E. | |