What is the equation for average power of discrete time periodic signa – McqOptions

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1.	What is the equation for average power of discrete time periodic signal x(n) with period N in terms of Fourier series coefficient c_k?
A.	( sum_{k=0}^{N-1}\|c_k\| )
B.	( sum_{k=0}^{N-1}\|c_k\|^2 )
C.	( sum_{k=0}^N\|c_k\|^2 )
D.	( sum_{k=0}^N\|c_k\| )
Answer» C. ( sum_{k=0}^N\|c_k\|^2 )

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