Let X[k], k = 0, ..., M-1 be the DFT of M points of a real sequence x[n]. If we know the DFT value for a certain index k

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answerhappygod
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Let X[k], k = 0, ..., M-1 be the DFT of M points of a real sequence x[n]. If we know the DFT value for a certain index k

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Let X[k], k = 0, ..., M-1 be the DFT of M points of a realsequence x[n]. If we know the DFT value for a certain index k (0< k < M-1), for what other index k2 ( 0< k2< M-1) canwe determine the DFT value? What is the value of the DFT fork2?
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