How many complex additions are performed in computing the N-point DFT – McqOptions

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1.	How many complex additions are performed in computing the N-point DFT of a sequence using divide-and-conquer method if N=LM?
A.	N(L+M+2)
B.	N(L+M-2)
C.	N(L+M-1)
D.	N(L+M+1)
Answer» C. N(L+M-1)

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