单项选择题
The spectrum of a sequence is , then X[3] in the 6-poin……
The spectrum of a sequence is 
, then X[3] in the 6-point DFT of this sequence is equal to
A、2/3
B、1/3
C、3/2
D、3
, then X[3] in the 6-point DFT of this sequence is equal toA、2/3
B、1/3
C、3/2
D、3