EC > GATE 2015 SET-2 > Signals and Systems - Fourier Series
The magnitude and phase of the complex Fourier series coefficients ak of a periodic signal x(t) are shown in the figure. Choose the correct statement from the four choices given. Notation: C is the set of complex numbers, R is the set of purely real numbers, and P is the set of purely imaginary numbers.
A
x(t) ∈ R
B
x(t) ∈ P
C
x(t) ∈ (C−R)
D
the information given is not sufficient to draw any conclusion about x(t)

Correct : a

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complex fourier series EC GATE 2015 complex numbers purely real numbers purely imaginary numbers Fourier series EC GATE EC 2015 complex set notation EC gate questions

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